{"id":"CVE-2026-64128","state":"PUBLISHED","title":"Bluetooth: ISO: drop ISO_END frames received without prior ISO_START","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: drop ISO_END frames received without prior ISO_START\n\nISO data PDUs carry a packet-boundary flag indicating START, CONT, END\nor SINGLE. The ISO_CONT branch of iso_recv() guards against a missing\nISO_START by checking conn->rx_len before touching conn->rx_skb, but\nISO_END does not.\n\nIf a peer sends an ISO_END as the first packet on a fresh ISO\nconnection, conn->rx_skb is still NULL and conn->rx_len is zero, so\nskb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS,\nwhere receivers sync to a broadcaster without pairing, any broadcaster\non the air can trigger this.\n\nMirror the ISO_CONT check at the top of ISO_END so a stray end fragment\nis logged and dropped instead of crashing the host.","publishedAt":"2026-07-19T15:40:24.678Z","updatedAt":"2026-07-19T15:40:24.678Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"1c3d1e1696b72579b970e17999c503a14535205b","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"3af41ee7ebecb0d5c8a504861f6cfad31345310f","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"39f4a82e80c8f5ed2d6952d73fbafc895721a728","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"61f2410a96dee808029e2ae4d6ef2dd635f3477f","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"e3a799881c12d27596232636a607e2e3fa448d63","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"84c24fb151fc1179355296d7ff29129ac7c42129","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/iso.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","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/bluetooth/iso.c"]}],"references":["https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b","https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f","https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728","https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f","https://git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63","https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64128.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64128","state":"PUBLISHED","datePublished":"2026-07-19T15:40:24.678Z","dateUpdated":"2026-07-19T15:40:24.678Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.036Z"},"containers":{"cna":{"title":"Bluetooth: ISO: drop ISO_END frames received without prior ISO_START","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: drop ISO_END frames received without prior ISO_START\n\nISO data PDUs carry a packet-boundary flag indicating START, CONT, END\nor SINGLE. The ISO_CONT branch of iso_recv() guards against a missing\nISO_START by checking conn->rx_len before touching conn->rx_skb, but\nISO_END does not.\n\nIf a peer sends an ISO_END as the first packet on a fresh ISO\nconnection, conn->rx_skb is still NULL and conn->rx_len is zero, so\nskb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS,\nwhere receivers sync to a broadcaster without pairing, any broadcaster\non the air can trigger this.\n\nMirror the ISO_CONT check at the top of ISO_END so a stray end fragment\nis logged and dropped instead of crashing the host."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"1c3d1e1696b72579b970e17999c503a14535205b","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"3af41ee7ebecb0d5c8a504861f6cfad31345310f","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"39f4a82e80c8f5ed2d6952d73fbafc895721a728","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"61f2410a96dee808029e2ae4d6ef2dd635f3477f","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"e3a799881c12d27596232636a607e2e3fa448d63","versionType":"git"},{"version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","status":"affected","lessThan":"84c24fb151fc1179355296d7ff29129ac7c42129","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/bluetooth/iso.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.142","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.92","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.34","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","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/bluetooth/iso.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b"},{"url":"https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f"},{"url":"https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728"},{"url":"https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f"},{"url":"https://git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63"},{"url":"https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-19T15:40:24.678Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.142"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.92"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}