Use After Free Affecting kernel-libbpf package, versions <0:6.1.34-59.116.amzn2023


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELLIBBPF-5756491
  • published6 Jul 2023
  • disclosed11 Jul 2023

Introduced: 6 Jul 2023

CVE-2023-3269  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-libbpf to version 0:6.1.34-59.116.amzn2023 or higher.
This issue was patched in ALAS2023-2023-234.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-libbpf package and not the kernel-libbpf package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A vulnerability exists in the memory management subsystem of the Linux kernel. The lock handling for accessing and updating virtual memory areas (VMAs) is incorrect, leading to use-after-free problems. This issue can be successfully exploited to execute arbitrary kernel code, escalate containers, and gain root privileges.

CVSS Scores

version 3.1