Improper Privilege Management Affecting kernel-debug package, versions <0:4.18.0-477.43.1.el8_8


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-KERNELDEBUG-6214050
  • published31 Jan 2024
  • disclosed27 Oct 2023

Introduced: 27 Oct 2023

CVE-2023-46813  (opens in a new tab)
CWE-269  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:8 kernel-debug to version 0:4.18.0-477.43.1.el8_8 or higher.
This issue was patched in RHSA-2024:0575.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug package and not the kernel-debug 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