CVE-2023-0266

HIGH7.9

CISA KEV

Published 2023-01-30 · Updated 2026-06-17 · Source cve-coordination@google.com

Summary

CVE-2023-0266 is a high-severity (CVSS 7.9) vulnerability in Linux Kernel. CISA added it to the Known Exploited Vulnerabilities catalog on March 30, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 20, 2023. CISA does not currently list it as used in ransomware campaigns. Linux has 32 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 32 known-exploited Linux vulnerabilities →

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

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

CWE-416CWE-416

CISA Known-Exploited Vulnerability

Product: Linux — Kernel

Name: Linux Kernel Use-After-Free Vulnerability

Date added: 2023-03-30 · Due: 2023-04-20

Required action: Apply updates per vendor instructions.

References

View on NVD

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