{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52931","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.369Z","datePublished":"2026-06-24T07:14:23.349Z","dateUpdated":"2026-06-28T06:36:51.143Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-28T06:36:51.143Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: avoid use of uninit sender vars\n\nbatadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the\nBATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it\nproceeds to read sender-only members that were never initialized, leading\nto undefined behavior.\n\nThis can be triggered when a node that is currently acting as a receiver in\nan ongoing tp_meter session receives a malicious ACK packet.\n\nGuard against this by checking tp_vars->role immediately after the\nlookup and bailing out if it is not BATADV_TP_SENDER, before any of\nthose members are accessed."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/tp_meter.c"],"versions":[{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"0e388af04b3958b178a1b979527f93eb46ea1fee","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"1a21c055f66e78973712a4a1be2a554f1ee2e4f4","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"9884c9c02d3c90e9215db3c5128f59045d20ae91","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"53f931e0146ae5bdab4cba302646827d06b3794b","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"ecdaa3e4d91040206afe21bc8a0d1198a0971ff3","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"dc2ae5fbd2dadc26735092f140b246841d969a11","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"85397e48afe6be83ffca5ad3f4792296bfc81d3d","status":"affected","versionType":"git"},{"version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","lessThan":"6c65cf23d4c6170fcf5714c32aa64689718cb142","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/tp_meter.c"],"versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"5.10.258","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.209","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.175","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.142","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.92","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.34","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.11","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee"},{"url":"https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4"},{"url":"https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91"},{"url":"https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b"},{"url":"https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3"},{"url":"https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11"},{"url":"https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d"},{"url":"https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142"}],"title":"batman-adv: tp_meter: avoid use of uninit sender vars","x_generator":{"engine":"bippy-1.2.0"}}}}