Improper Privilege Management Affecting kernel-modules-extra package, versions <0:4.18.0-513.18.1.el8_9


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELMODULESEXTRA-6039191
  • published30 Oct 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 RHEL:8 kernel-modules-extra to version 0:4.18.0-513.18.1.el8_9 or higher.
This issue was patched in RHSA-2024:0897.

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 RHEL. See How to fix? for RHEL:8 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