PT-2026-39100 · Linux · Linux Kernel

Published 2026-05-08 · Updated 2026-05-15 · CVE-2026-43439

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/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 race condition exists between task migration and iteration within the cgroup component. When a task is migrated out of a css set, the cgroup migrate add task() function moves the task from cset->tasks to cset->mg tasks. If a css task iter is currently pointing to that task, the iterator may advance relative to the mg tasks list instead of the original tasks list. This can cause the iteration to skip remaining tasks on cset->tasks as well as tasks queued on cset->mg tasks.

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

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-43439

Affected Products

Linux Kernel

References · 19

• https://cve.org/CVERecord?id=CVE-2026-43439 · Security Note
• https://git.kernel.org/stable/c/9dc76f6fc0d28d2382583715bc4ec22f28104845 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-43439 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-43439 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-43439 · Security Note
• https://git.kernel.org/stable/c/5ee01f1a7343d6a3547b6802ca2d4cdce0edacb1 · Patch
• https://git.kernel.org/stable/c/7c85debc35e6d131bd29c64f2ae78c6ede0e55c4 · Patch
• https://git.kernel.org/stable/c/3b95abab7369235a37b15eaec6e1a0b443bba7c7 · Patch
• https://git.kernel.org/stable/c/9cca530c7cc1b3e02cb8fa7f80060dd4b38562ce · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43439 · Vendor Advisory
• https://git.kernel.org/stable/c/4a9654a2b46cfdaae287fb8995f536245635e467 · Patch
• https://git.kernel.org/stable/c/3dfd1328c05234e8d8fa61948b2ba82680594988 · Patch
• https://ubuntu.com/security/CVE-2026-43439 · Vendor Advisory
• https://git.kernel.org/stable/c/86ceaccfdfa16dad05addb33dc206e03589bcfd1 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43439 · Vendor Advisory