{"api_version":"1","generated_at":"2026-06-26T04:52:11+00:00","cve":"CVE-2026-52931","urls":{"html":"https://cve.report/CVE-2026-52931","api":"https://cve.report/api/cve/CVE-2026-52931.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52931","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52931"},"summary":{"title":"batman-adv: tp_meter: avoid use of uninit sender vars","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:23","updated_at":"2026-06-24 08:16:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91","name":"https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d","name":"https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b","name":"https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3","name":"https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4","name":"https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee","name":"https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11","name":"https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142","name":"https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52931","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52931","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 0e388af04b3958b178a1b979527f93eb46ea1fee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 1a21c055f66e78973712a4a1be2a554f1ee2e4f4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 9884c9c02d3c90e9215db3c5128f59045d20ae91 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e 53f931e0146ae5bdab4cba302646827d06b3794b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.209 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.175 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"52931","cve":"CVE-2026-52931","epss":"0.001650000","percentile":"0.060210000","score_date":"2026-06-25","updated_at":"2026-06-26 00:06:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/batman-adv/tp_meter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0e388af04b3958b178a1b979527f93eb46ea1fee","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"1a21c055f66e78973712a4a1be2a554f1ee2e4f4","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"9884c9c02d3c90e9215db3c5128f59045d20ae91","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"53f931e0146ae5bdab4cba302646827d06b3794b","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"ecdaa3e4d91040206afe21bc8a0d1198a0971ff3","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"dc2ae5fbd2dadc26735092f140b246841d969a11","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"85397e48afe6be83ffca5ad3f4792296bfc81d3d","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"6c65cf23d4c6170fcf5714c32aa64689718cb142","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/batman-adv/tp_meter.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.8"},{"lessThan":"4.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"4.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:23.349Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52931","datePublished":"2026-06-24T07:14:23.349Z","dateReserved":"2026-06-09T07:44:35.369Z","dateUpdated":"2026-06-24T07:14:23.349Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:23","lastModifiedDate":"2026-06-24 08:16:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52931","Ordinal":"1","Title":"batman-adv: tp_meter: avoid use of uninit sender vars","CVE":"CVE-2026-52931","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52931","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"batman-adv: tp_meter: avoid use of uninit sender vars"}]}}}