Use After Free Affecting kernel-modules-extra package, versions <0:4.18.0-305.86.2.el8_4


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.09% (38th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELMODULESEXTRA-5406815
  • published23 Jan 2023
  • disclosed13 Jan 2023

Introduced: 13 Jan 2023

CVE-2023-0266  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:8 kernel-modules-extra to version 0:4.18.0-305.86.2.el8_4 or higher.
This issue was patched in RHSA-2023:1557.

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.

A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e

CVSS Scores

version 3.1