PT-2026-52356 · Linux · Linux

Published 2026-06-25 · Updated 2026-06-25 · CVE-2026-53261

NVD

In the Linux kernel, the following vulnerability has been resolved:

devlink: Release nested relation on devlink free

devlink relation state is normally released from devl unregister(), which calls devlink rel put(). This misses devlink instances that get a nested relation before registration and then fail probe before devl register() is reached.

That flow can happen for SFs. The child devlink gets linked to its parent before registration, then a later probe error calls devlink free() directly. Since the instance was never registered, devl unregister() is not called and devlink->rel is leaked.

Release any pending relation from devlink free() as well. The registered path is unchanged because devl unregister() already clears devlink->rel before devlink free() runs.

Related Identifiers

CVE-2026-53261

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-53261 · Security Note
• https://git.kernel.org/stable/c/3522b21fd7e1863d0734537737bd59f1b90d0190 · Note
• https://git.kernel.org/stable/c/927f96861f939c0b517d13ed27bf4fabbfc1cfb3 · Note
• https://git.kernel.org/stable/c/11324d52b0c63f4f202b35793c6507a575e9a689 · Note
• https://git.kernel.org/stable/c/a9137286884703113b1c9e6403bd6d7d97b14754 · Note