Arbitrary Command Injection Affecting kernel package, versions <0:4.14.232-123.381.amzn1


Severity

Recommended
low

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-1725418
  • published27 Sept 2021
  • disclosed8 Apr 2021

Introduced: 8 Apr 2021

CVE-2021-29154  (opens in a new tab)
CWE-77  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.14.232-123.381.amzn1 or higher.
This issue was patched in ALAS-2021-1503.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them to execute arbitrary code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c and arch/x86/net/bpf_jit_comp32.c.

CVSS Scores

version 3.1