CVE-2023-0266

Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

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

Affected

Linux · Linux Kernel

CVSS v3.1 NVD

7.0 HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 GOOGLE

7.9 HIGHCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H

EPSS

3.67% chance of exploitation in the next 30 days, 90th percentile

CISA KEV

added 2023-03-30

Published

2023-01-30

Updated

2025-10-21

Proof-of-concept exploits (1)

• SeanHeelan/claude_opus_cve_2023_026616★ · 2024-03-19

Security advisories

• https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/a…
• https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
• torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e

References

• CVE Record
• NVD entry

Related

• CVE-2025-37899