There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the…
Priority LOW 27CWE-416Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Partial Red Hat: 18 fixed, 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the vgacon_invert_region function in drivers/video/console/vgacon.c.
Why it matters now
EPSS 0.00488 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 6 advisoriesRed Hat: 18 fixed, 4 without a fix
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | up to 5.5.2 | Vulnerable | Linux |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 5.5.2 Vulnerable ·Linux
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
Red Hat 6 advisories
- RHSA-2022:1213 Released 2022-04-05 · Red Hat rating Importantkernel security update
- Red Hat CodeReady Linux Builder EUS (v. 8.2) kernel-tools-libs-devel-4.18.0-193.80.1.el8_2
- Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bpftool-4.18.0-193.80.1.el8_2, kernel-4.18.0-193.80.1.el8_2, kernel-abi-whitelists-4.18.0-193.80.1.el8_2 +19
- RHSA-2022:1209 Released 2022-04-05 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time EUS (v. 8.2) kernel-rt-4.18.0-193.80.1.rt13.130.el8_2, kernel-rt-core-4.18.0-193.80.1.rt13.130.el8_2, kernel-rt-debug-4.18.0-193.80.1.rt13.130.el8_2 +7
- Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) kernel-rt-4.18.0-193.80.1.rt13.130.el8_2, kernel-rt-core-4.18.0-193.80.1.rt13.130.el8_2, kernel-rt-debug-4.18.0-193.80.1.rt13.130.el8_2 +9
- RHSA-2020:4609 Released 2020-11-04 · Red Hat rating Moderatekernel-rt security and bug fix update
- Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-240.rt7.54.el8, kernel-rt-core-4.18.0-240.rt7.54.el8, kernel-rt-debug-4.18.0-240.rt7.54.el8 +7
- Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-240.rt7.54.el8, kernel-rt-core-4.18.0-240.rt7.54.el8, kernel-rt-debug-4.18.0-240.rt7.54.el8 +9
Show 3 more Red Hat advisories
- RHSA-2020:4431 Released 2020-11-04 · Red Hat rating Moderatekernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-240.el8
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-240.el8, kernel-4.18.0-240.el8, kernel-abi-whitelists-4.18.0-240.el8 +19
- RHSA-2020:4060 Released 2020-09-29 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
- Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
- Red Hat Enterprise Linux Server (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-1160.el7, kernel-tools-libs-devel-3.10.0-1160.el7
- Red Hat Enterprise Linux Workstation (v. 7) bpftool-3.10.0-1160.el7, kernel-3.10.0-1160.el7, kernel-abi-whitelists-3.10.0-1160.el7 +8
- Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-1160.el7
- RHSA-2020:4062 Released 2020-09-29 · Red Hat rating Importantkernel-rt security and bug fix update
- Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7 +4
- Red Hat Enterprise Linux for Real Time for NFV (v. 7) kernel-rt-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-3.10.0-1160.rt56.1131.el7, kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7 +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise MRG 2 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2020:4431 |
| Red Hat CodeReady Linux Builder EUS (v. 8.2) | Fixed | RHSA-2022:1213 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2020:4431 |
| Red Hat Enterprise Linux BaseOS EUS (v. 8.2) | Fixed | RHSA-2022:1213 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux Real Time (v. 8) | Fixed | RHSA-2020:4609 |
| Red Hat Enterprise Linux Real Time EUS (v. 8.2) | Fixed | RHSA-2022:1209 |
| Red Hat Enterprise Linux Real Time for NFV (v. 8) | Fixed | RHSA-2020:4609 |
| Red Hat Enterprise Linux Real Time for NFV EUS (v. 8.2) | Fixed | RHSA-2022:1209 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:4060 |
| Red Hat Enterprise Linux for Real Time (v. 7) | Fixed | RHSA-2020:4062 |
| Red Hat Enterprise Linux for Real Time for NFV (v. 7) | Fixed | RHSA-2020:4062 |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8649
- 2026-10-03 Alias added: GHSA-3fg2-94qq-385g
References
Sources
- CVE-2020-8649 · CVE Program
- CVE-2020-8649 · NVD
- FIRST EPSS
- GHSA-3fg2-94qq-385g · GitHub Advisory Database · CC BY 4.0
- CVE-2020-8649 · Red Hat security data · CC BY 4.0
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