{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63946", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.023Z", "datePublished": "2026-07-19T14:55:40.577Z", "dateUpdated": "2026-07-20T13:41:47.085Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:41:47.085Z"}, "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": {"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"}}], "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": "c57ea90f203c8b8b41a474f19a09000d0f841436", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "119fb6f80c44dc1c65d604cf28e64c56bd9b6568", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "b04ec131325baf4ea4577d6c6e6b86cf092e3731", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "c318aa51830a3d2cc1229968fe521441c97356cd", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "1a6b803b00ccdd7666506adbe01ddae1c72d1ca9", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "47f23a259517abbdb8032c057a1e8a6bf3734878", "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/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"}}}}

{}

{}

{"bugzilla": {"description": "kernel: Bluetooth: ISO: fix UAF in iso_recv_frame", "id": "2502446", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502446"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-366", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: ISO: fix UAF in iso_recv_frame\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().\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.", "A flaw was found in the Linux kernel's Bluetooth ISO (Isochronous Stream) subsystem. This vulnerability, known as a Use-After-Free, occurs because the system attempts to use a memory area after it has been released, which can lead to unpredictable behavior. A malicious actor could potentially exploit this flaw to execute unauthorized code, gaining full control over the affected system."], "name": "CVE-2026-63946", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63946\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63946\nhttps://lore.kernel.org/linux-cve-announce/2026071954-CVE-2026-63946-b5d8@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,c57ea90f203c8b8b41a474f19a09000d0f841436)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,119fb6f80c44dc1c65d604cf28e64c56bd9b6568)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,b04ec131325baf4ea4577d6c6e6b86cf092e3731)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,c318aa51830a3d2cc1229968fe521441c97356cd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,1a6b803b00ccdd7666506adbe01ddae1c72d1ca9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,47f23a259517abbdb8032c057a1e8a6bf3734878)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-21T07:45:03.518356+00:00", "updated": "2026-07-22T18:30:03.532214+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}