Race condition in Ubuntu grub2 in Ubuntu
Priority LOW 30CWE-362Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, Red Hat and Microsoft. Impact type from CWE-416 and the CVSS impact.
Summary
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Why it matters now
EPSS 0.00977 62nd percentileScored 2026-11-07
Fix Fixed grub2 in Ubuntu (Ubuntu): 2.04-1ubuntu26.1, 2.02-2ubuntu8.16, 2.02~beta2-36ubuntu3.26 +1Red Hat: 9 advisoriesMicrosoft: 1 update
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Ubuntu | grub2 in Ubuntu | 20.04 LTS to before 2.04-1ubuntu26.1; 18.04 LTS to before 2.02-2ubuntu8.16; 16.04 LTS to before 2.02~beta2-36ubuntu3.26; 14.04 ESM to before 2.02~beta2-9ubuntu1.20 | 2.04-1ubuntu26.1, 2.02-2ubuntu8.16, 2.02~beta2-36ubuntu3.26, 2.02~beta2-9ubuntu1.20 | Patch available | CNA |
- grub2 in Ubuntu VendorUbuntu Affected 20.04 LTS to before 2.04-1ubuntu26.1; 18.04 LTS to before 2.02-2ubuntu8.16; 16.04 LTS to before 2.02~beta2-36ubuntu3.26; 14.04 ESM to before 2.02~beta2-9ubuntu1.20 Fixed in 2.04-1ubuntu26.1, 2.02-2ubuntu8.16, 2.02~beta2-36ubuntu3.26, 2.02~beta2-9ubuntu1.20 Patch available CNA
CPE configurations NVD · 33
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* | up to 2.04 | Vulnerable | GNU |
| cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Red Hat |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
- cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* Versions up to 2.04 Vulnerable ·GNU
- cpe:2.3:a:redhat:enterprise_linux_atomic_host:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
- cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Red Hat
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
Show 23 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:* | 11 | Vulnerable | SUSE |
| cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:* | 12 | Vulnerable | SUSE |
| cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:* | 15 | Vulnerable | SUSE |
| cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* | 1607 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* | 1709 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* | 1803 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* | 1809 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* | 1903 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* | 1909 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* | 1903 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* | 1909 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
- cpe:2.3:o:suse:suse_linux_enterprise_server:11:*:*:*:*:*:*:* Versions 11 Vulnerable ·SUSE
- cpe:2.3:o:suse:suse_linux_enterprise_server:12:*:*:*:*:*:*:* Versions 12 Vulnerable ·SUSE
- cpe:2.3:o:suse:suse_linux_enterprise_server:15:*:*:*:*:*:*:* Versions 15 Vulnerable ·SUSE
- cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* Versions 1607 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:* Versions 1709 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:* Versions 1803 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:* Versions 1809 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* Versions 1903 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* Versions 1903 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:* Versions 1909 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
Remediation
- Fix · CNA grub2 in Ubuntu (Ubuntu) Fixed in 2.04-1ubuntu26.1, 2.02-2ubuntu8.16, 2.02~beta2-36ubuntu3.26, 2.02~beta2-9ubuntu1.20
Red Hat 9 advisories
- RHSA-2020:3274 Released 2020-08-03 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) fwupdate-12-6.el7_7, fwupdate-efi-12-6.el7_7, fwupdate-libs-12-6.el7_7 +18
- Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) fwupdate-devel-12-6.el7_7, grub2-efi-aa64-modules-1:2.02-0.86.el7_7, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_7 +4
- Red Hat Enterprise Linux Server EUS (v. 7.7) fwupdate-12-6.el7_7, fwupdate-efi-12-6.el7_7, fwupdate-libs-12-6.el7_7 +22
- Red Hat Enterprise Linux Server Optional EUS (v. 7.7) fwupdate-devel-12-6.el7_7, grub2-efi-aa64-modules-1:2.02-0.86.el7_7, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_7 +7
- RHSA-2020:3276 Released 2020-08-03 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux Server AUS (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-ia32-1:2.02-0.86.el7 +17
- Red Hat Enterprise Linux Server E4S (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-aa64-modules-1:2.02-0.86.el7 +21
- Red Hat Enterprise Linux Server Optional AUS (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-aa64-modules-1:2.02-0.86.el7 +17
- Red Hat Enterprise Linux Server Optional E4S (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-aa64-modules-1:2.02-0.86.el7 +18
- Red Hat Enterprise Linux Server Optional TUS (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-aa64-modules-1:2.02-0.86.el7 +17
- Red Hat Enterprise Linux Server TUS (v. 7.3) grub2-1:2.02-0.86.el7, grub2-common-1:2.02-0.86.el7, grub2-efi-aa64-modules-1:2.02-0.86.el7 +20
- RHSA-2020:3271 Released 2020-08-03 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) fwupdate-12-6.el7_6, fwupdate-efi-12-6.el7_6, fwupdate-libs-12-6.el7_6 +18
- Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) fwupdate-devel-12-6.el7_6, grub2-efi-aa64-modules-1:2.02-0.86.el7_6, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_6 +4
- Red Hat Enterprise Linux Server EUS (v. 7.6) fwupdate-12-6.el7_6, fwupdate-efi-12-6.el7_6, fwupdate-libs-12-6.el7_6 +22
- Red Hat Enterprise Linux Server Optional EUS (v. 7.6) fwupdate-devel-12-6.el7_6, grub2-efi-aa64-modules-1:2.02-0.86.el7_6, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_6 +7
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) grub2-1:2.02-0.86.el7_6, grub2-common-1:2.02-0.86.el7_6, grub2-ppc64le-1:2.02-0.86.el7_6 +4
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) grub2-efi-aa64-modules-1:2.02-0.86.el7_6, grub2-efi-ia32-modules-1:2.02-0.86.el7_6, grub2-efi-x64-modules-1:2.02-0.86.el7_6 +3
Show 6 more Red Hat advisories
- RHSA-2020:3275 Released 2020-08-03 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux Server AUS (v. 7.4) fwupdate-9-10.el7_4, fwupdate-efi-9-10.el7_4, fwupdate-libs-9-10.el7_4 +18
- Red Hat Enterprise Linux Server E4S (v. 7.4) fwupdate-9-10.el7_4, fwupdate-efi-9-10.el7_4, fwupdate-libs-9-10.el7_4 +20
- Red Hat Enterprise Linux Server Optional AUS (v. 7.4) fwupdate-9-10.el7_4, fwupdate-devel-9-10.el7_4, grub2-efi-aa64-modules-1:2.02-0.86.el7_4 +5
- Red Hat Enterprise Linux Server Optional E4S (v. 7.4) fwupdate-9-10.el7_4, fwupdate-devel-9-10.el7_4, grub2-efi-aa64-modules-1:2.02-0.86.el7_4 +8
- Red Hat Enterprise Linux Server Optional TUS (v. 7.4) fwupdate-9-10.el7_4, fwupdate-devel-9-10.el7_4, grub2-efi-aa64-modules-1:2.02-0.86.el7_4 +5
- Red Hat Enterprise Linux Server TUS (v. 7.4) fwupdate-9-10.el7_4, fwupdate-efi-9-10.el7_4, fwupdate-libs-9-10.el7_4 +18
- RHSA-2020:3273 Released 2020-08-03 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux Server AUS (v. 7.2) grub2-1:2.02-0.86.el7_2, grub2-common-1:2.02-0.86.el7_2, grub2-efi-ia32-1:2.02-0.86.el7_2 +14
- Red Hat Enterprise Linux Server Optional AUS (v. 7.2) grub2-1:2.02-0.86.el7_2, grub2-efi-aa64-modules-1:2.02-0.86.el7_2, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_2 +10
- RHSA-2020:3227 Released 2020-07-29 · Red Hat rating Moderategrub2 security update
- Red Hat Enterprise Linux BaseOS E4S (v. 8.0) fwupd-1.1.4-2.el8_0, grub2-1:2.02-87.el8_0, grub2-common-1:2.02-87.el8_0 +18
- RHSA-2020:3217 Released 2020-07-29 · Red Hat rating Moderategrub2 security and bug fix update
- Red Hat Enterprise Linux Client (v. 7) fwupdate-12-6.el7_8, fwupdate-efi-12-6.el7_8, fwupdate-libs-12-6.el7_8 +18
- Red Hat Enterprise Linux Client Optional (v. 7) fwupdate-devel-12-6.el7_8, grub2-efi-aa64-modules-1:2.02-0.86.el7_8, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_8 +4
- Red Hat Enterprise Linux ComputeNode (v. 7) fwupdate-12-6.el7_8, fwupdate-efi-12-6.el7_8, fwupdate-libs-12-6.el7_8 +18
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) fwupdate-devel-12-6.el7_8, grub2-efi-aa64-modules-1:2.02-0.86.el7_8, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_8 +4
- Red Hat Enterprise Linux Server (v. 7) fwupdate-12-6.el7_8, fwupdate-efi-12-6.el7_8, fwupdate-libs-12-6.el7_8 +22
- Red Hat Enterprise Linux Server Optional (v. 7) fwupdate-devel-12-6.el7_8, grub2-efi-aa64-modules-1:2.02-0.86.el7_8, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_8 +7
- Red Hat Enterprise Linux Workstation (v. 7) fwupdate-12-6.el7_8, fwupdate-efi-12-6.el7_8, fwupdate-libs-12-6.el7_8 +18
- Red Hat Enterprise Linux Workstation Optional (v. 7) fwupdate-devel-12-6.el7_8, grub2-efi-aa64-modules-1:2.02-0.86.el7_8, grub2-efi-ia32-cdboot-1:2.02-0.86.el7_8 +4
- RHSA-2020:3223 Released 2020-07-29 · Red Hat rating Moderategrub2 security update
- Red Hat CodeReady Linux Builder EUS (v. 8.1) shim-unsigned-x64-15-7.el8
- Red Hat Enterprise Linux BaseOS EUS (v. 8.1) fwupd-1.1.4-2.el8_1, grub2-1:2.02-87.el8_1, grub2-common-1:2.02-87.el8_1 +21
- RHSA-2020:3216 Released 2020-07-29 · Red Hat rating Moderategrub2 security update
- Red Hat CodeReady Linux Builder (v. 8) shim-unsigned-x64-15-7.el8
- Red Hat Enterprise Linux BaseOS (v. 8) fwupd-1.1.4-7.el8_2, grub2-1:2.02-87.el8_2, grub2-common-1:2.02-87.el8_2 +21
Microsoft 1 update
- ADV200011 Released 2020-07-29Microsoft Guidance for Addressing Security Feature Bypass in GRUB
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Ubuntu grub2 in Ubuntu — ubuntu.com/security/notices/USN-4432-1
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — access.redhat.com/security/vulnerabilities/grub2bootloader
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
Show 8 more groups
- Advisory ·
Ubuntu grub2 in Ubuntu — USN-4432-1
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootB…
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — debian.org/security/2020-GRUB-UEFI-SecureBoot
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — suse.com/c/suse-addresses-grub2-secure-boot-issue
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — suse.com/support/kb/doc/?id=000019673
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- TI-2020-12377 GRUB2: avoid loading unsigned kernels when GRUB is booted directly under secureboot without shimPriority LOW 31
- Advisory ·
Ubuntu grub2 in Ubuntu — openSUSE-SU-2020:1168
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- Advisory ·
Ubuntu grub2 in Ubuntu — openSUSE-SU-2020:1169
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
- Advisory ·
Ubuntu grub2 in Ubuntu — DSA-4735
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2020-12379 GRUB2 contained integer overflows when handling the initrd command, leading to a heap-based buffer overflow.Priority LOW 32
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2020:3216 |
| Red Hat CodeReady Linux Builder EUS (v. 8.1) | Fixed | RHSA-2020:3223 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2020:3216 |
| Red Hat Enterprise Linux BaseOS E4S (v. 8.0) | Fixed | RHSA-2020:3227 |
| Red Hat Enterprise Linux BaseOS EUS (v. 8.1) | Fixed | RHSA-2020:3223 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) | Fixed | RHSA-2020:3271 |
| Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) | Fixed | RHSA-2020:3274 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) | Fixed | RHSA-2020:3271 |
| Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) | Fixed | RHSA-2020:3274 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux Server AUS (v. 7.2) | Fixed | RHSA-2020:3273 |
| Red Hat Enterprise Linux Server AUS (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server AUS (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Server E4S (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server E4S (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2020:3271 |
| Red Hat Enterprise Linux Server EUS (v. 7.7) | Fixed | RHSA-2020:3274 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux Server Optional AUS (v. 7.2) | Fixed | RHSA-2020:3273 |
| Red Hat Enterprise Linux Server Optional AUS (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server Optional AUS (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Server Optional E4S (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server Optional E4S (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Server Optional EUS (v. 7.6) | Fixed | RHSA-2020:3271 |
| Red Hat Enterprise Linux Server Optional EUS (v. 7.7) | Fixed | RHSA-2020:3274 |
| Red Hat Enterprise Linux Server Optional TUS (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server Optional TUS (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Server TUS (v. 7.3) | Fixed | RHSA-2020:3276 |
| Red Hat Enterprise Linux Server TUS (v. 7.4) | Fixed | RHSA-2020:3275 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:3217 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2020:3271 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2020:3271 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-15706
- 2026-10-03 Alias added: GHSA-gmqm-wgp3-r69q
References
Advisory 16
- https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
- https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
- http://ubuntu.com/security/notices/USN-4432-1
- https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
- https://access.redhat.com/security/vulnerabilities/grub2bootloader
- https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
- https://www.suse.com/support/kb/doc/?id=000019673
- https://www.openwall.com/lists/oss-security/2020/07/29/3
- https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
- DSA-4735
- [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities
- https://security.netapp.com/advisory/ntap-20200731-0008/
- USN-4432-1
- openSUSE-SU-2020:1169
- openSUSE-SU-2020:1168
- GLSA-202104-05
More Ubuntu vulnerabilities
- TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
- TI-2007-05153 Stack-based buffer overflow in the cons_options function in options.c in dhcpd in OpenBSD… CVSS 2.0HIGH 7.2
- TI-2004-01032 Multiple vulnerabilities in the IGMP functionality for Linux kernel 2.4.22 to 2.4.28, and… CVSS 2.0HIGH 10.0
- TI-2004-00896 Multiple buffer overflows in libXML 2.6.12 and 2.6.13 (libxml2), and possibly other… CVSS 2.0HIGH 10.0
- TI-2004-00800 Buffer overflow in the QFILEPATHINFO request handler in Samba 3.0.x through 3.0.7 may… CVSS 2.0HIGH 10.0
- TI-2004-00962 Buffer overflow in the exif_read_data function in PHP before 4.3.10 and PHP 5.x up to… CVSS 2.0HIGH 10.0
Sources
- CVE-2020-15706 · CVE Program
- CVE-2020-15706 · NVD
- FIRST EPSS
- GHSA-gmqm-wgp3-r69q · GitHub Advisory Database · CC BY 4.0
- CVE-2020-15706 · Red Hat security data · CC BY 4.0
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