{"api_version":"1","generated_at":"2026-07-23T20:04:05+00:00","cve":"CVE-2026-63946","urls":{"html":"https://cve.report/CVE-2026-63946","api":"https://cve.report/api/cve/CVE-2026-63946.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63946","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63946"},"summary":{"title":"Bluetooth: ISO: fix UAF in iso_recv_frame","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix UAF in iso_recv_frame\n\niso_recv_frame reads conn->sk under iso_conn_lock but releases the lock\nbefore using sk, with no reference held. A concurrent iso_sock_kill()\ncan free sk in that window, causing use-after-free on sk->sk_state and\nsock_queue_rcv_skb().\n\nFix by replacing the bare pointer read with iso_sock_hold(conn), which\ncalls sock_hold() while the spinlock is held, atomically elevating the\nrefcount before the lock drops. Add a drop_put label so sock_put() is\ncalled on all exit paths where the hold succeeded.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:13","updated_at":"2026-07-20 15:16:58"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436","name":"https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9","name":"https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878","name":"https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731","name":"https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd","name":"https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568","name":"https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63946","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63946","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a c57ea90f203c8b8b41a474f19a09000d0f841436 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 119fb6f80c44dc1c65d604cf28e64c56bd9b6568 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a b04ec131325baf4ea4577d6c6e6b86cf092e3731 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a c318aa51830a3d2cc1229968fe521441c97356cd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 1a6b803b00ccdd7666506adbe01ddae1c72d1ca9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ccf74f2390d60a2f9a75ef496d2564abb478f46a 47f23a259517abbdb8032c057a1e8a6bf3734878 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 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":"63946","cve":"CVE-2026-63946","epss":"0.002050000","percentile":"0.107250000","score_date":"2026-07-20","updated_at":"2026-07-21 00:13:13"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/bluetooth/iso.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c57ea90f203c8b8b41a474f19a09000d0f841436","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"},{"lessThan":"119fb6f80c44dc1c65d604cf28e64c56bd9b6568","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"},{"lessThan":"b04ec131325baf4ea4577d6c6e6b86cf092e3731","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"},{"lessThan":"c318aa51830a3d2cc1229968fe521441c97356cd","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"},{"lessThan":"1a6b803b00ccdd7666506adbe01ddae1c72d1ca9","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"},{"lessThan":"47f23a259517abbdb8032c057a1e8a6bf3734878","status":"affected","version":"ccf74f2390d60a2f9a75ef496d2564abb478f46a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/bluetooth/iso.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.0"},{"lessThan":"6.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","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":"6.1.176","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.0","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix UAF in iso_recv_frame\n\niso_recv_frame reads conn->sk under iso_conn_lock but releases the lock\nbefore using sk, with no reference held. A concurrent iso_sock_kill()\ncan free sk in that window, causing use-after-free on sk->sk_state and\nsock_queue_rcv_skb().\n\nFix by replacing the bare pointer read with iso_sock_hold(conn), which\ncalls sock_hold() while the spinlock is held, atomically elevating the\nrefcount before the lock drops. Add a drop_put label so sock_put() is\ncalled on all exit paths where the hold succeeded."}],"metrics":[{"cvssV3_1":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:41:47.085Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c57ea90f203c8b8b41a474f19a09000d0f841436"},{"url":"https://git.kernel.org/stable/c/119fb6f80c44dc1c65d604cf28e64c56bd9b6568"},{"url":"https://git.kernel.org/stable/c/b04ec131325baf4ea4577d6c6e6b86cf092e3731"},{"url":"https://git.kernel.org/stable/c/c318aa51830a3d2cc1229968fe521441c97356cd"},{"url":"https://git.kernel.org/stable/c/1a6b803b00ccdd7666506adbe01ddae1c72d1ca9"},{"url":"https://git.kernel.org/stable/c/47f23a259517abbdb8032c057a1e8a6bf3734878"}],"title":"Bluetooth: ISO: fix UAF in iso_recv_frame","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63946","datePublished":"2026-07-19T14:55:40.577Z","dateReserved":"2026-07-19T07:54:57.023Z","dateUpdated":"2026-07-20T13:41:47.085Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:13","lastModifiedDate":"2026-07-20 15:16:58","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63946","Ordinal":"1","Title":"Bluetooth: ISO: fix UAF in iso_recv_frame","CVE":"CVE-2026-63946","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63946","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: fix UAF in iso_recv_frame\n\niso_recv_frame reads conn->sk under iso_conn_lock but releases the lock\nbefore using sk, with no reference held. A concurrent iso_sock_kill()\ncan free sk in that window, causing use-after-free on sk->sk_state and\nsock_queue_rcv_skb().\n\nFix by replacing the bare pointer read with iso_sock_hold(conn), which\ncalls sock_hold() while the spinlock is held, atomically elevating the\nrefcount before the lock drops. Add a drop_put label so sock_put() is\ncalled on all exit paths where the hold succeeded.","Type":"Description","Title":"Bluetooth: ISO: fix UAF in iso_recv_frame"}]}}}