{"api_version":"1","generated_at":"2026-06-25T13:13:34+00:00","cve":"CVE-2026-52919","urls":{"html":"https://cve.report/CVE-2026-52919","api":"https://cve.report/api/cve/CVE-2026-52919.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52919","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52919"},"summary":{"title":"batman-adv: fix tp_meter counter underflow during shutdown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix tp_meter counter underflow during shutdown\n\nbatadv_tp_sender_shutdown() unconditionally decrements the \"sending\"\natomic counter. If multiple paths (e.g. timeout, user cancel, and\nnormal finish) call this function, the counter can underflow to -1.\n\nSince the sender logic treats any non-zero value as \"still sending\",\na negative value causes the sender kthread to loop indefinitely.\nThis leads to a use-after-free when the interface is removed while\nthe zombie thread is still active.\n\nFix this by using atomic_xchg() to ensure the counter only transitions\nfrom 1 to 0 once.\n\n[sven: added missing change in batadv_tp_send]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:21","updated_at":"2026-06-24 08:16:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/01cefc5923889e29dbb5f281c3d457714ceb9c00","name":"https://git.kernel.org/stable/c/01cefc5923889e29dbb5f281c3d457714ceb9c00","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c66d20a3ff095e3f000551d208ec2606616db15c","name":"https://git.kernel.org/stable/c/c66d20a3ff095e3f000551d208ec2606616db15c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/abae88fa254f2981d39ac003a7b302528a22af64","name":"https://git.kernel.org/stable/c/abae88fa254f2981d39ac003a7b302528a22af64","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aeae11c5dad9cd0d50723890bdd866f8e6db2e7d","name":"https://git.kernel.org/stable/c/aeae11c5dad9cd0d50723890bdd866f8e6db2e7d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/94f3b133168d1c49895e7cc6afbcf1cc0b354602","name":"https://git.kernel.org/stable/c/94f3b133168d1c49895e7cc6afbcf1cc0b354602","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/90ae3eae06b7b8ab9f6250b9497c860915b4c17b","name":"https://git.kernel.org/stable/c/90ae3eae06b7b8ab9f6250b9497c860915b4c17b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e75e2ab463b5b34df6b98f94d740aff327ce9f6b","name":"https://git.kernel.org/stable/c/e75e2ab463b5b34df6b98f94d740aff327ce9f6b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c1bac194733aabd731aafa6a01350c229e187dba","name":"https://git.kernel.org/stable/c/c1bac194733aabd731aafa6a01350c229e187dba","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52919","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52919","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e e75e2ab463b5b34df6b98f94d740aff327ce9f6b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e abae88fa254f2981d39ac003a7b302528a22af64 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e c66d20a3ff095e3f000551d208ec2606616db15c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 33a3bb4a3345bb511f9c69c913da95d4693e2a4e c1bac194733aabd731aafa6a01350c229e187dba git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"52919","cve":"CVE-2026-52919","epss":"0.001640000","percentile":"0.059380000","score_date":"2026-06-24","updated_at":"2026-06-25 00:05:28"},"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":"e75e2ab463b5b34df6b98f94d740aff327ce9f6b","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"abae88fa254f2981d39ac003a7b302528a22af64","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"c66d20a3ff095e3f000551d208ec2606616db15c","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"c1bac194733aabd731aafa6a01350c229e187dba","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"01cefc5923889e29dbb5f281c3d457714ceb9c00","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"90ae3eae06b7b8ab9f6250b9497c860915b4c17b","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"aeae11c5dad9cd0d50723890bdd866f8e6db2e7d","status":"affected","version":"33a3bb4a3345bb511f9c69c913da95d4693e2a4e","versionType":"git"},{"lessThan":"94f3b133168d1c49895e7cc6afbcf1cc0b354602","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: fix tp_meter counter underflow during shutdown\n\nbatadv_tp_sender_shutdown() unconditionally decrements the \"sending\"\natomic counter. If multiple paths (e.g. timeout, user cancel, and\nnormal finish) call this function, the counter can underflow to -1.\n\nSince the sender logic treats any non-zero value as \"still sending\",\na negative value causes the sender kthread to loop indefinitely.\nThis leads to a use-after-free when the interface is removed while\nthe zombie thread is still active.\n\nFix this by using atomic_xchg() to ensure the counter only transitions\nfrom 1 to 0 once.\n\n[sven: added missing change in batadv_tp_send]"}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:15.201Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e75e2ab463b5b34df6b98f94d740aff327ce9f6b"},{"url":"https://git.kernel.org/stable/c/abae88fa254f2981d39ac003a7b302528a22af64"},{"url":"https://git.kernel.org/stable/c/c66d20a3ff095e3f000551d208ec2606616db15c"},{"url":"https://git.kernel.org/stable/c/c1bac194733aabd731aafa6a01350c229e187dba"},{"url":"https://git.kernel.org/stable/c/01cefc5923889e29dbb5f281c3d457714ceb9c00"},{"url":"https://git.kernel.org/stable/c/90ae3eae06b7b8ab9f6250b9497c860915b4c17b"},{"url":"https://git.kernel.org/stable/c/aeae11c5dad9cd0d50723890bdd866f8e6db2e7d"},{"url":"https://git.kernel.org/stable/c/94f3b133168d1c49895e7cc6afbcf1cc0b354602"}],"title":"batman-adv: fix tp_meter counter underflow during shutdown","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52919","datePublished":"2026-06-24T07:14:15.201Z","dateReserved":"2026-06-09T07:44:35.367Z","dateUpdated":"2026-06-24T07:14:15.201Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:21","lastModifiedDate":"2026-06-24 08:16:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52919","Ordinal":"1","Title":"batman-adv: fix tp_meter counter underflow during shutdown","CVE":"CVE-2026-52919","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52919","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix tp_meter counter underflow during shutdown\n\nbatadv_tp_sender_shutdown() unconditionally decrements the \"sending\"\natomic counter. If multiple paths (e.g. timeout, user cancel, and\nnormal finish) call this function, the counter can underflow to -1.\n\nSince the sender logic treats any non-zero value as \"still sending\",\na negative value causes the sender kthread to loop indefinitely.\nThis leads to a use-after-free when the interface is removed while\nthe zombie thread is still active.\n\nFix this by using atomic_xchg() to ensure the counter only transitions\nfrom 1 to 0 once.\n\n[sven: added missing change in batadv_tp_send]","Type":"Description","Title":"batman-adv: fix tp_meter counter underflow during shutdown"}]}}}