{"id":"CVE-2026-46233","state":"PUBLISHED","title":"batman-adv: bla: only purge non-released claims","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: only purge non-released claims\n\nWhen batadv_bla_purge_claims() goes through the list of claims, it is only\ntraversing the hash list with an rcu_read_lock(). Due to a potential\nparallel batadv_claim_put(), it can happen that it encounters a claim which\nwas actually in the process of being released+freed by\nbatadv_claim_release(). In this case, backbone_gw is set to NULL before the\ndelayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is\nthen no longer allowed because it would cause a NULL-ptr derefence.\n\nTo avoid this, only claims with a valid reference counter must be purged.\nAll others are already taken care of.","publishedAt":"2026-05-28T09:40:55.019Z","updatedAt":"2026-06-14T18:04:36.157Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"6725c523a35eeca611ff37e7d4a8712fae92aefd","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"afb5436f6028fd68f408f189230fbaa19c910d72","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"7b8fbcee3184d848b5aee085ca16d0cf05c9b641","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"b65365d2b1e6095c538d49baeb140dd1c166c1b3","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"cf6b604011591865ae39ac82de8978c1120d17af","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bridge_loop_avoidance.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.5","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bridge_loop_avoidance.c"]}],"references":["https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe","https://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefd","https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72","https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641","https://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe","https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3","https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d","https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17af"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46233.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46233","state":"PUBLISHED","datePublished":"2026-05-28T09:40:55.019Z","dateUpdated":"2026-06-14T18:04:36.157Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.106Z"},"containers":{"cna":{"title":"batman-adv: bla: only purge non-released claims","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: only purge non-released claims\n\nWhen batadv_bla_purge_claims() goes through the list of claims, it is only\ntraversing the hash list with an rcu_read_lock(). Due to a potential\nparallel batadv_claim_put(), it can happen that it encounters a claim which\nwas actually in the process of being released+freed by\nbatadv_claim_release(). In this case, backbone_gw is set to NULL before the\ndelayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is\nthen no longer allowed because it would cause a NULL-ptr derefence.\n\nTo avoid this, only claims with a valid reference counter must be purged.\nAll others are already taken care of."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"6725c523a35eeca611ff37e7d4a8712fae92aefd","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"afb5436f6028fd68f408f189230fbaa19c910d72","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"7b8fbcee3184d848b5aee085ca16d0cf05c9b641","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"b65365d2b1e6095c538d49baeb140dd1c166c1b3","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d","versionType":"git"},{"version":"23721387c409087fd3b97e274f34d3ddc0970b74","status":"affected","lessThan":"cf6b604011591865ae39ac82de8978c1120d17af","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bridge_loop_avoidance.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.5","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/batman-adv/bridge_loop_avoidance.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbe"},{"url":"https://git.kernel.org/stable/c/6725c523a35eeca611ff37e7d4a8712fae92aefd"},{"url":"https://git.kernel.org/stable/c/afb5436f6028fd68f408f189230fbaa19c910d72"},{"url":"https://git.kernel.org/stable/c/7b8fbcee3184d848b5aee085ca16d0cf05c9b641"},{"url":"https://git.kernel.org/stable/c/7b7ebb7222a5524ce58e48cc9c6d688320ea6cfe"},{"url":"https://git.kernel.org/stable/c/b65365d2b1e6095c538d49baeb140dd1c166c1b3"},{"url":"https://git.kernel.org/stable/c/ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8d"},{"url":"https://git.kernel.org/stable/c/cf6b604011591865ae39ac82de8978c1120d17af"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T18:04:36.157Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.12.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"6.18.32"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"7.0.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}