CVE-2023-0266

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

Score

CVSS 3.1 7.9 High

Status

Analyzed - cve-coordination@google.com

Published

2023-01-30

Last modified

2025-10-21

Known exploited (CISA KEV)

since 2023-03-30, action due 2023-04-20: Apply updates per vendor instructions.

Weaknesses

CWE-416

Affected products

• Debian Linux (Debian)
• Linux Kernel (Linux)

References

• https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside…
• https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e
• https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1
• https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266