CVE-2026-52931Critical· 9.8▾ MidnightIn 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 wi…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.4%
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.
Linux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 0e388af04b3958b178a1b979527f93eb46ea1feeLinux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 1a21c055f66e78973712a4a1be2a554f1ee2e4f4Linux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 9884c9c02d3c90e9215db3c5128f59045d20ae91Linux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 53f931e0146ae5bdab4cba302646827d06b3794bLinux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < ecdaa3e4d91040206afe21bc8a0d1198a0971ff3Linux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < dc2ae5fbd2dadc26735092f140b246841d969a11Linux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 85397e48afe6be83ffca5ad3f4792296bfc81d3dLinux >= 33a3bb4a3345bb511f9c69c913da95d4693e2a4e < 6c65cf23d4c6170fcf5714c32aa64689718cb142Linux 4.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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