PT-2026-51724 · Linux · Linux

Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-52931

NVD

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

batman-adv: tp meter: avoid use of uninit sender vars

batadv tp recv ack() and batadv tp stop() are only valid for tp vars in the BATADV TP SENDER role. When called with a BATADV TP RECEIVER role, it proceeds to read sender-only members that were never initialized, leading to undefined behavior.

This can be triggered when a node that is currently acting as a receiver in an ongoing tp meter session receives a malicious ACK packet.

Guard against this by checking tp vars->role immediately after the lookup and bailing out if it is not BATADV TP SENDER, before any of those members are accessed.

Related Identifiers

CVE-2026-52931

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-52931 · Security Note
• https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91 · Note
• https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142 · Note
• https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d · Note
• https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee · Note
• https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b · Note
• https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 · Note
• https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4 · Note
• https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11 · Note