CVE-2026-64128

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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": [{"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": "1c3d1e1696b72579b970e17999c503a14535205b", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "3af41ee7ebecb0d5c8a504861f6cfad31345310f", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "39f4a82e80c8f5ed2d6952d73fbafc895721a728", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "61f2410a96dee808029e2ae4d6ef2dd635f3477f", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "e3a799881c12d27596232636a607e2e3fa448d63", "status": "affected", "versionType": "git"}, {"version": "ccf74f2390d60a2f9a75ef496d2564abb478f46a", "lessThan": "84c24fb151fc1179355296d7ff29129ac7c42129", "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": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "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": "6.1.175"}, {"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"}]}]}], "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"}], "title": "Bluetooth: ISO: drop ISO_END frames received without prior ISO_START", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64128", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:30:23.419580Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:34:26.719Z"}}]}}

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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.142", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.92", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.34", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.11", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "6.0"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:40:24.678Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64128", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:34:26.719Z", "dateReserved": "2026-07-19T07:54:57.036Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-19T15:40:24.678Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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."}], "id": "CVE-2026-64128", "lastModified": "2026-11-06T17:18:37.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64128", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:30:23.419580Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:17:54.510", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e3a799881c12d27596232636a607e2e3fa448d63"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: Bluetooth: ISO: drop ISO_END frames received without prior ISO_START", "id": "2502572", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502572"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's Bluetooth Isochronous Stream (ISO) subsystem. A remote attacker, specifically any broadcaster on the air for Broadcast Isochronous Stream (BIS), can send a malformed Bluetooth packet (an ISO_END frame without a prior ISO_START frame) to a vulnerable system. This can lead to a null pointer dereference, causing the kernel to crash and resulting in a denial of service."], "name": "CVE-2026-64128", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"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-2026-64128\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64128\nhttps://lore.kernel.org/linux-cve-announce/2026071926-CVE-2026-64128-f336@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,1c3d1e1696b72579b970e17999c503a14535205b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,3af41ee7ebecb0d5c8a504861f6cfad31345310f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,39f4a82e80c8f5ed2d6952d73fbafc895721a728)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,61f2410a96dee808029e2ae4d6ef2dd635f3477f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,e3a799881c12d27596232636a607e2e3fa448d63)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ccf74f2390d60a2f9a75ef496d2564abb478f46a,84c24fb151fc1179355296d7ff29129ac7c42129)"}}], "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": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T20:00:06.144436+00:00", "updated": "2026-07-30T20:30:04.647420+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}