{"api_version":"1","generated_at":"2026-07-24T21:14:38+00:00","cve":"CVE-2026-64218","urls":{"html":"https://cve.report/CVE-2026-64218","api":"https://cve.report/api/cve/CVE-2026-64218.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64218","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64218"},"summary":{"title":"batman-adv: bla: fix report_work leak on backbone_gw purge","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: fix report_work leak on backbone_gw purge\n\nbatadv_bla_purge_backbone_gw() removes stale backbone gateway entries,\nbut fails to properly handle their associated report_work:\n\n- If report_work is running, the purge must wait for it to finish before\n  freeing the backbone_gw, otherwise the worker may access freed memory\n  (e.g. bat_priv).\n- If report_work is pending, the purge must cancel it and release the\n  reference held for that pending work item.\n\nThe previous implementation called hlist_for_each_entry_safe() inside a\nspin_lock_bh() section, but cancel_work_sync() may sleep and therefore\ncannot be called from within a spinlock-protected region.\n\nRestructure the loop to handle one entry per spinlock critical section:\nacquire the lock, find the next entry to purge, remove it from the hash\nlist, then release the lock before calling cancel_work_sync() and\ndropping the hash_entry reference. Repeat until no more entries require\npurging.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-24 16:16:49","updated_at":"2026-07-24 16:16:49"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c6de1a5a9c406e30b91f1515a6ce05cc84023baa","name":"https://git.kernel.org/stable/c/c6de1a5a9c406e30b91f1515a6ce05cc84023baa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7","name":"https://git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707","name":"https://git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b","name":"https://git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec","name":"https://git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9","name":"https://git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb","name":"https://git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a","name":"https://git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64218","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64218","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 ce2c0ee4d76d5ee4b391fe0e31334361e25030ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 3423a45e5c3d3c5129f88143a9a969787d7d5a0a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 f1303adb1e59582f76c22798a2e2e150e054a9e7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 48663158222b3b7f6ee6791a67d512ede7fc94bb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 eeddd7bab3d59c1e98642a204141f8c5d6194707 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 c6de1a5a9c406e30b91f1515a6ce05cc84023baa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 95a7034661274cf5985708bd2f6d86ee46f88fa9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 23721387c409087fd3b97e274f34d3ddc0970b74 0459430add32ea41f3e2ef9351610e6d33627a6b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.258 5.10.* 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/batman-adv/bridge_loop_avoidance.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ce2c0ee4d76d5ee4b391fe0e31334361e25030ec","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"3423a45e5c3d3c5129f88143a9a969787d7d5a0a","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"f1303adb1e59582f76c22798a2e2e150e054a9e7","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"48663158222b3b7f6ee6791a67d512ede7fc94bb","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"eeddd7bab3d59c1e98642a204141f8c5d6194707","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"c6de1a5a9c406e30b91f1515a6ce05cc84023baa","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"95a7034661274cf5985708bd2f6d86ee46f88fa9","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"},{"lessThan":"0459430add32ea41f3e2ef9351610e6d33627a6b","status":"affected","version":"23721387c409087fd3b97e274f34d3ddc0970b74","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/batman-adv/bridge_loop_avoidance.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.5"},{"lessThan":"3.5","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":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"3.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"3.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: fix report_work leak on backbone_gw purge\n\nbatadv_bla_purge_backbone_gw() removes stale backbone gateway entries,\nbut fails to properly handle their associated report_work:\n\n- If report_work is running, the purge must wait for it to finish before\n  freeing the backbone_gw, otherwise the worker may access freed memory\n  (e.g. bat_priv).\n- If report_work is pending, the purge must cancel it and release the\n  reference held for that pending work item.\n\nThe previous implementation called hlist_for_each_entry_safe() inside a\nspin_lock_bh() section, but cancel_work_sync() may sleep and therefore\ncannot be called from within a spinlock-protected region.\n\nRestructure the loop to handle one entry per spinlock critical section:\nacquire the lock, find the next entry to purge, remove it from the hash\nlist, then release the lock before calling cancel_work_sync() and\ndropping the hash_entry reference. Repeat until no more entries require\npurging."}],"providerMetadata":{"dateUpdated":"2026-07-24T15:23:05.814Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec"},{"url":"https://git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a"},{"url":"https://git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7"},{"url":"https://git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb"},{"url":"https://git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707"},{"url":"https://git.kernel.org/stable/c/c6de1a5a9c406e30b91f1515a6ce05cc84023baa"},{"url":"https://git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9"},{"url":"https://git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b"}],"title":"batman-adv: bla: fix report_work leak on backbone_gw purge","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64218","datePublished":"2026-07-24T15:23:05.814Z","dateReserved":"2026-07-19T15:36:31.770Z","dateUpdated":"2026-07-24T15:23:05.814Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-24 16:16:49","lastModifiedDate":"2026-07-24 16:16:49","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64218","Ordinal":"1","Title":"batman-adv: bla: fix report_work leak on backbone_gw purge","CVE":"CVE-2026-64218","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64218","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: fix report_work leak on backbone_gw purge\n\nbatadv_bla_purge_backbone_gw() removes stale backbone gateway entries,\nbut fails to properly handle their associated report_work:\n\n- If report_work is running, the purge must wait for it to finish before\n  freeing the backbone_gw, otherwise the worker may access freed memory\n  (e.g. bat_priv).\n- If report_work is pending, the purge must cancel it and release the\n  reference held for that pending work item.\n\nThe previous implementation called hlist_for_each_entry_safe() inside a\nspin_lock_bh() section, but cancel_work_sync() may sleep and therefore\ncannot be called from within a spinlock-protected region.\n\nRestructure the loop to handle one entry per spinlock critical section:\nacquire the lock, find the next entry to purge, remove it from the hash\nlist, then release the lock before calling cancel_work_sync() and\ndropping the hash_entry reference. Repeat until no more entries require\npurging.","Type":"Description","Title":"batman-adv: bla: fix report_work leak on backbone_gw purge"}]}}}