{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63945", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.022Z", "datePublished": "2026-07-19T14:55:39.859Z", "dateUpdated": "2026-07-19T14:55:39.859Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:55:39.859Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: ISO: serialize iso_sock_clear_timer with socket lock\n\niso_sock_close() calls iso_sock_clear_timer() before acquiring\nlock_sock(sk).\n\niso_sock_clear_timer() reads iso_pi(sk)->conn twice without the\nsocket lock held:\n\n if (!iso_pi(sk)->conn)\n return;\n cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);\n\nConcurrently, iso_conn_del() executes under lock_sock(sk) and calls\niso_chan_del(), which sets iso_pi(sk)->conn to NULL and may result in\nthe final reference to the connection being dropped:\n\n CPU0 CPU1\n ---- ----\n iso_sock_clear_timer()\n if (conn != NULL) ... lock_sock(sk)\n iso_chan_del()\n iso_pi(sk)->conn = NULL\n cancel_delayed_work(conn) /* NULL deref or UAF */\n\niso_pi(sk)->conn is not stable across the unlock window, causing a\nNULL pointer dereference or use-after-free.\n\nSerialize iso_sock_clear_timer() with the socket lock by moving it\ninside lock_sock()/release_sock(), matching the pattern used in\niso_conn_del() and all other call sites."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/iso.c"], "versions": [{"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "35f68f36d9883d56dec21cf85f7556d4657fc393", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "996c2104d0726a8fe584f85b3d6327197374a348", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "bc08c15746f25f41dd0508b25780d1e84acbb2ef", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "4b5f8e608749b7e8fa386c6e4301cf9272595859", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/iso.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d9cbf7144ec589a3f0cc91f74a1a1af2d2b14afa"}, {"url": "https://git.kernel.org/stable/c/35f68f36d9883d56dec21cf85f7556d4657fc393"}, {"url": "https://git.kernel.org/stable/c/996c2104d0726a8fe584f85b3d6327197374a348"}, {"url": "https://git.kernel.org/stable/c/bc08c15746f25f41dd0508b25780d1e84acbb2ef"}, {"url": "https://git.kernel.org/stable/c/51cb9dcfdf9a1bccf312ab2ae4b62db629f7dcd5"}, {"url": "https://git.kernel.org/stable/c/4b5f8e608749b7e8fa386c6e4301cf9272595859"}], "title": "Bluetooth: ISO: serialize iso_sock_clear_timer with socket lock", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{}