PT-2026-37466 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-07 · CVE-2026-43126

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A Use-After-Free (UAF) issue exists in the ALSA OSS mixer layer. The mixer layer calls kcontrol operations individually, which may result in pending calls not being caught when a device is disconnected. This allows the mixer to attempt to access a sound card after it has been torn down.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-43126

Affected Products

Linux Kernel

References · 14

• https://ubuntu.com/security/CVE-2026-43126 · Vendor Advisory
• https://git.kernel.org/stable/c/e6645e625480cdf1079a4265f758d13b70721029 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43126 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43126 · Vendor Advisory
• https://git.kernel.org/stable/c/ae583f113d15fa97e5234133c20d09f8e6214e47 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43126 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-43126 · Vendor Advisory
• https://git.kernel.org/stable/c/084d5d44418148662365eced3e126ad1a81ee3e2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43126 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43126 · Vendor Advisory
• https://git.kernel.org/stable/c/8c097cf736993454acf3f711a3b376d6c7ad8965 · Patch
• https://docs.bell-sw.com/security/cves/CVE-2026-43126 · Note
• https://git.kernel.org/linus/084d5d44418148662365eced3e126ad1a81ee3e2 · Note
• https://twitter.com/windowsforum/status/2052315046760321338 · Twitter Post