batman-adv: tp_meter: avoid use of uninit sender vars

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-52931
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 08:16:23 UTC
Updated2026-07-08 15:28:16 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.004040000 probability, percentile 0.324650000 (date 2026-07-09)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 0e388af04b3958b178a1b979527f93eb46ea1fee git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 1a21c055f66e78973712a4a1be2a554f1ee2e4f4 git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 9884c9c02d3c90e9215db3c5128f59045d20ae91 git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 53f931e0146ae5bdab4cba302646827d06b3794b git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e dc2ae5fbd2dadc26735092f140b246841d969a11 git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 85397e48afe6be83ffca5ad3f4792296bfc81d3d git Not specified
CNA Linux Linux affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 6c65cf23d4c6170fcf5714c32aa64689718cb142 git Not specified
CNA Linux Linux affected 4.8 Not specified
CNA Linux Linux unaffected 4.8 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.142 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.92 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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