Improper Privilege Management Affecting kernel-modules-extra package, versions <0:6.1.61-85.141.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELMODULESEXTRA-6057500
  • published15 Nov 2023
  • disclosed27 Oct 2023

Introduced: 27 Oct 2023

CVE-2023-46813  (opens in a new tab)
CWE-269  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-modules-extra to version 0:6.1.61-85.141.amzn2023 or higher.
This issue was patched in ALAS2023-2023-430.

NVD Description

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

An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it.

CVSS Scores

version 3.1