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TI-2020-11254 Aliases CVE-2020-14386

Out-of-bounds write in Linux kernel

Priority LOW 37CWE-250Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation, Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-250, CWE-787 and the CVSS impact.

Summary

A flaw was found in the Linux kernel before 5.9-rc4. Memory corruption can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.

Why it matters now

EPSS 0.01319 71st percentileScored 2026-11-07
Fix Fixed kernel (Linux Kernel): 5.9-rc4Red Hat: 6 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Linuxkernelbefore 5.9-rc45.9-rc4Patch availableCNA
  • kernel VendorLinux Affected before 5.9-rc4 Fixed in 5.9-rc4 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.6 to before 4.9.239; 4.10 to before 4.14.201; 4.15 to before 4.19.150; 4.20 to before 5.4.64; 5.5 to before 5.8.8VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.9.0:rc1:*:*:*:*:*:*5.9.0 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.9.0:rc2:*:*:*:*:*:*5.9.0 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.9.0:rc3:*:*:*:*:*:*5.9.0 rc3VulnerableLinux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.6 to before 4.9.239; 4.10 to before 4.14.201; 4.15 to before 4.19.150; 4.20 to before 5.4.64; 5.5 to before 5.8.8 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.9.0:rc1:*:*:*:*:*:* Versions 5.9.0 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.9.0:rc2:*:*:*:*:*:* Versions 5.9.0 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.9.0:rc3:*:*:*:*:*:* Versions 5.9.0 rc3 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

  • Fix · CNA kernel (Linux Kernel) Fixed in 5.9-rc4

Red Hat 6 advisories

  • RHSA-2020:5199 Released 2020-11-24 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v. 8.0) bpftool-4.18.0-80.31.1.el8_0, kernel-4.18.0-80.31.1.el8_0, kernel-abi-whitelists-4.18.0-80.31.1.el8_0 +14
  • RHSA-2020:4331 Released 2020-10-26 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS (v. 8) kpatch-patch-4_18_0-193-1-7.el8, kpatch-patch-4_18_0-193_13_2-1-2.el8_2, kpatch-patch-4_18_0-193_14_3-1-2.el8_2 +3
  • RHSA-2020:4332 Released 2020-10-26 · Red Hat rating Important
    kpatch-patch security update
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) kpatch-patch-4_18_0-147-1-18.el8, kpatch-patch-4_18_0-147_0_2-1-14.el8, kpatch-patch-4_18_0-147_0_3-1-14.el8 +7
Show 3 more Red Hat advisories
  • RHSA-2020:4289 Released 2020-10-20 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-193.28.1.rt13.77.el8_2, kernel-rt-core-4.18.0-193.28.1.rt13.77.el8_2, kernel-rt-debug-4.18.0-193.28.1.rt13.77.el8_2 +7
    • Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-193.28.1.rt13.77.el8_2, kernel-rt-core-4.18.0-193.28.1.rt13.77.el8_2, kernel-rt-debug-4.18.0-193.28.1.rt13.77.el8_2 +9
  • RHSA-2020:4286 Released 2020-10-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-193.28.1.el8_2
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-193.28.1.el8_2, kernel-4.18.0-193.28.1.el8_2, kernel-abi-whitelists-4.18.0-193.28.1.el8_2 +19
  • RHSA-2020:4287 Released 2020-10-20 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat CodeReady Linux Builder EUS (v. 8.1) kernel-tools-libs-devel-4.18.0-147.32.1.el8_1
    • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bpftool-4.18.0-147.32.1.el8_1, kernel-4.18.0-147.32.1.el8_1, kernel-abi-whitelists-4.18.0-147.32.1.el8_1 +19

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2020:4286
Red Hat CodeReady Linux Builder EUS (v. 8.1)Fixed RHSA-2020:4287
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:4286, RHSA-2020:4331
Red Hat Enterprise Linux BaseOS E4S (v. 8.0)Fixed RHSA-2020:5199
Red Hat Enterprise Linux BaseOS EUS (v. 8.1)Fixed RHSA-2020:4287, RHSA-2020:4332
Red Hat Enterprise Linux Real Time (v. 8)Fixed RHSA-2020:4289
Red Hat Enterprise Linux Real Time for NFV (v. 8)Fixed RHSA-2020:4289
Not affected: 4 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise MRG 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-14386

References

Patch 3

Advisory 9

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences