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CWE

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CVE-2023-0266

Published: Jan 30, 2023

Modified: Oct 21, 2025

PUBLISHED

CVSS v3.1

7.9

HIGH

Description

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

Vendor	Product	Versions
Linux	Linux Kernel	affected `4.14 - < 56b88b50565cd8b946a2d00b0c83927b7ebb055e`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

High

Availability

High

References

https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1

https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/queue-5.10/alsa-pcm-move-rwsem-lock-inside-snd_ctl_elem_read-to-prevent-uaf.patch?id=72783cf35e6c55bca84c4bb7b776c58152856fd4

https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e

https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html

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