batman-adv: tp_meter: avoid use of uninit sender vars
Summary
| CVE | CVE-2026-52931 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-24 08:16:23 UTC |
| Updated | 2026-06-24 08:16:23 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001650000 probability, percentile 0.060210000 (date 2026-06-25)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| 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
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.