CVEvulnerability

CVE-2023-0266

7.0 HIGH Known exploited Published 2023-01-30 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Linux Kernel Use-After-Free Vulnerability — Linux Kernel

Linux kernel contains a use-after-free vulnerability that allows for privilege escalation to gain ring0 access from the system user.

Added to KEV
2023-03-30
Remediation due
2023-04-20
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
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://nvd.nist.gov/vuln/detail/CVE-2023-0266
Status
Analyzed
Published
2023-01-30
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.9 HIGH — CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:H
CVSS 3.1 ([email protected])
7.0 HIGH — CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

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

Affected configurations

• debian debian linux 10.0 • linux linux kernel (>= 4.14 < 4.14.303) • linux linux kernel (>= 4.15 < 4.19.270) • linux linux kernel (>= 4.20 < 5.4.229) • linux linux kernel (>= 5.5 < 5.10.163) • linux linux kernel (>= 5.11 < 5.15.88) • linux linux kernel (>= 5.16 < 6.1.6)

Related

Weakness · CWE (1)

References