Use After Free Affecting kernel-livepatch-4.14.294-220.533 package, versions <0:1.0-0.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.24% (15th percentile)

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  • Snyk IDSNYK-AMZN2-KERNELLIVEPATCH414294220533-3327411
  • published22 Feb 2023
  • disclosed2 Sept 2022

Introduced: 2 Sep 2022

CVE-2022-39188  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel-livepatch-4.14.294-220.533 to version 0:1.0-0.amzn2 or higher.
This issue was patched in ALAS2-2022-1852.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-4.14.294-220.533 package and not the kernel-livepatch-4.14.294-220.533 package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

An issue was discovered in include/asm-generic/tlb.h in the Linux kernel before 5.19. Because of a race condition (unmap_mapping_range versus munmap), a device driver can free a page while it still has stale TLB entries. This only occurs in situations with VM_PFNMAP VMAs.

CVSS Base Scores

version 3.1