PT-2026-61113 · Linux · Linux

CVE-2026-63797 · Published 2026-07-19 · Updated 2026-07-19

NVD

CVSS v3.1

8.4

High

Base vector

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

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

rpmsg: char: Fix use-after-free on probe error path

rpmsg chrdev probe() stores the newly allocated eptdev in the default endpoint's priv pointer before calling rpmsg chrdev eptdev add(). If rpmsg chrdev eptdev add() then fails, its error path frees eptdev while the default endpoint may still dispatch callbacks with the stale priv pointer.

Avoid publishing eptdev through the default endpoint until rpmsg chrdev eptdev add() succeeds. Messages received before the priv pointer is published should be ignored by rpmsg ept cb(). Flow-control updates can hit rpmsg ept flow cb() in the same window, so make both callbacks return success when priv is NULL.

Fix

Related Identifiers

CVE-2026-63797

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-63797 · Security Note
• https://git.kernel.org/stable/c/c5ebb06c7e24d531b68707168e04698859d642bc · Note
• https://git.kernel.org/stable/c/ddf13f91ca82c94ef7ad9c41a434a03313f8eb1b · Note
• https://git.kernel.org/stable/c/104d100212396801f1d9d388282f746e23e2bfd6 · Note
• https://git.kernel.org/stable/c/ff268cd9ccbce6472a0658791b417bf11c31ee39 · Note
• https://git.kernel.org/stable/c/1ff3f528e67d20e2b1483dcaba899dc7832b2e6b · Note