PT-2026-39129 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-21 · CVE-2026-43468

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A deadlock occurs between the devlink lock and esw->work queue. The esw->work queue executes esw functions changed event handler which calls esw vfs changed event handler and acquires the devlink lock. Simultaneously, .eswitch mode set acquires the devlink lock in devlink nl pre doit, leading to a sequence through mlx5 devlink eswitch mode set, mlx5 eswitch disable locked, and mlx5 eswitch event handler unregister that calls flush workqueue, resulting in a deadlock when esw vfs changed event handler is executing.

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

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-43468

Affected Products

Linux Kernel

References · 19

• https://git.kernel.org/stable/c/90e7e5d14d0bd25ffd019a3aa39d9f1c05fedbe1 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-43468 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43468 · Vendor Advisory
• https://git.kernel.org/stable/c/0de867f6e34eae6907b367fd152c55e61cb98608 · Patch
• https://git.kernel.org/stable/c/3c7313cb41b1b427078440364d2f042c276a1c0b · Patch
• https://cve.org/CVERecord?id=CVE-2026-43468 · Security Note
• https://git.kernel.org/stable/c/957d2a58f7f8ebcbdd0a85935e0d2675134b890d · Patch
• https://ubuntu.com/security/CVE-2026-43468 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43468 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43468 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43468 · Vendor Advisory
• https://git.kernel.org/stable/c/4a7838bebc38374f74baaf88bf2cf8d439a92923 · Patch
• https://git.kernel.org/stable/c/aed763abf0e905b4b8d747d1ba9e172961572f57 · Patch
• https://t.me/cveNotify/164393 · Telegram Post
• https://git.kernel.org/linus/aed763abf0e905b4b8d747d1ba9e172961572f57 · Note