CVE-2023-0266

HIGH KEV

ALSA PCM - Use After Free

Title source: llm

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

Exploits (1)

nomisec WRITEUP 17 stars

by SeanHeelan · poc

https://github.com/SeanHeelan/claude_opus_cve_2023_0266

View Code ZIP pw:eip

References (5)

[Mailing List, Patch, Vendor Advisory] 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

[Patch] https://github.com/torvalds/linux/commit/56b88b50565cd8b946a2d00b0c83927b7ebb055e

[Patch] https://github.com/torvalds/linux/commit/becf9e5d553c2389d857a3c178ce80fdb34a02e1

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html

[US Government Resource] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-0266

Scores

CVSS v3 7.9

EPSS 0.0016

EPSS Percentile 36.4%

Attack Vector ADJACENT_NETWORK

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

Details

CISA KEV 2023-03-30

VulnCheck KEV 2023-03-29

InTheWild.io 2023-01-12

ENISA EUVD EUVD-2023-12345

CWE

CWE-416

Status published

Products (2)

debian/debian_linux 10.0

linux/linux_kernel 4.14 - 4.14.303

Published Jan 30, 2023

KEV Added Mar 30, 2023

Tracked Since Feb 18, 2026