{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64011", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.027Z", "datePublished": "2026-07-19T14:56:25.901Z", "dateUpdated": "2026-08-05T12:38:11.263Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:38:11.263Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: Fix use-after-free in llcp_sock_release()\n\nllcp_sock_release() unconditionally unlinks the socket from the local\nsockets list. However, if the socket is still in connecting state, it\nis on the connecting list.\n\nFix this by checking the socket state and unlinking from the correct list."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is triggered in llcp_sock_release() via the local close(2) syscall on an AF_NFC LLCP socket left in LLCP_CONNECTING after a non-blocking connect(); no remote network protocol reaches this unlink path directly.\nAC:L - An attacker fully controls the race by opening an LLCP socket, calling connect() with O_NONBLOCK, and immediately closing it; no privileged setup or uncontrollable memory-layout conditions are required beyond an active NFC DEP link.\nPR:L - SOCK_STREAM/SOCK_DGRAM LLCP sockets require no capability checks at creation or release (only SOCK_RAW needs CAP_NET_RAW), so any unprivileged local process in init_net can reach the vulnerable close() path once an NFC DEP session is up.\nUI:N - Exploitation requires only programmatic socket connect/close calls from a malicious local process; no victim user action (such as tapping, mounting, or opening a file) is needed at exploit time if an NFC link is already established.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security boundary and can lead to local privilege escalation, not a cross-boundary escape such as VM or sandbox breakout.\nC:H - This is a kernel heap use-after-free of struct nfc_llcp_sock; freed socket objects can be reallocated and read through subsequent list lookups or concurrent recv_cc()/recv_dm() processing, enabling arbitrary kernel memory disclosure.\nI:H - A use-after-free on a socket structure embedded in struct sock provides standard kernel heap-spray primitives that can be leveraged for arbitrary write and local privilege escalation via control-flow hijacking.\nA:H - The use-after-free can cause immediate kernel oops/panic during concurrent list traversal or socket teardown, and successful exploitation yields full kernel compromise with total system unavailability."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/llcp_sock.c"], "versions": [{"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "89ba026747019ee643d29407435ddc118e6ca908", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "fb29f6bbe433f3decad227588809636c25f2a287", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "2dfdaaf7d933b676124aadec6698825e95f94fe9", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "e00f50f8697724a6f1d2d35744c1332c9912dac5", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "cdc17e09a636c7f936f771902535a7515a7608fc", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "912ebc49d4406a17fe73e5671d674fbc2f6b2634", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "bc421d0826dedbba37580a25405eafb599e76d42", "status": "affected", "versionType": "git"}, {"version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "lessThan": "f4268b466190dae95a7585f69b4f1f8ad097632c", "status": "affected", "versionType": "git"}, {"version": "da989ee1c7702050741a551df6866cc1588f277b", "status": "affected", "versionType": "git"}, {"version": "3.10.10", "lessThan": "3.11", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": 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"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": "3.11", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/912ebc49d4406a17fe73e5671d674fbc2f6b2634"}, {"url": "https://git.kernel.org/stable/c/bc421d0826dedbba37580a25405eafb599e76d42"}, {"url": "https://git.kernel.org/stable/c/f4268b466190dae95a7585f69b4f1f8ad097632c"}], "title": "nfc: llcp: Fix use-after-free in llcp_sock_release()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/nfc/llcp_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "89ba026747019ee643d29407435ddc118e6ca908", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "fb29f6bbe433f3decad227588809636c25f2a287", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "2dfdaaf7d933b676124aadec6698825e95f94fe9", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "e00f50f8697724a6f1d2d35744c1332c9912dac5", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "cdc17e09a636c7f936f771902535a7515a7608fc", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "912ebc49d4406a17fe73e5671d674fbc2f6b2634", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "bc421d0826dedbba37580a25405eafb599e76d42", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"lessThan": "f4268b466190dae95a7585f69b4f1f8ad097632c", "status": "affected", "version": "b4011239a08e7e6c2c6e970dfa9e8ecb73139261", "versionType": "git"}, {"status": "affected", "version": "da989ee1c7702050741a551df6866cc1588f277b", "versionType": "git"}, {"lessThan": "3.11", "status": "affected", "version": "3.10.10", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/nfc/llcp_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.11"}, {"lessThan": "3.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.259", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.210", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: Fix use-after-free in llcp_sock_release()\n\nllcp_sock_release() unconditionally unlinks the socket from the local\nsockets list. However, if the socket is still in connecting state, it\nis on the connecting list.\n\nFix this by checking the socket state and unlinking from the correct list."}], "id": "CVE-2026-64011", "lastModified": "2026-07-30T14:59:47.950", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-19T16:17:40.933", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2dfdaaf7d933b676124aadec6698825e95f94fe9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89ba026747019ee643d29407435ddc118e6ca908"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/912ebc49d4406a17fe73e5671d674fbc2f6b2634"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc421d0826dedbba37580a25405eafb599e76d42"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cdc17e09a636c7f936f771902535a7515a7608fc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e00f50f8697724a6f1d2d35744c1332c9912dac5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4268b466190dae95a7585f69b4f1f8ad097632c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb29f6bbe433f3decad227588809636c25f2a287"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: nfc: llcp: Fix use-after-free in llcp_sock_release()", "id": "2502345", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502345"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnfc: llcp: Fix use-after-free in llcp_sock_release()\nllcp_sock_release() unconditionally unlinks the socket from the local\nsockets list. However, if the socket is still in connecting state, it\nis on the connecting list.\nFix this by checking the socket state and unlinking from the correct list.", "A flaw was found in the Linux kernel's Near Field Communication (NFC) Logical Link Control Protocol (LLCP) component. The `llcp_sock_release()` function, which handles the release of LLCP sockets, can incorrectly unlink a socket while it is still in a connecting state. This can result in a use-after-free vulnerability, where the system attempts to access deallocated memory. A local attacker could potentially exploit this to cause a system crash (denial of service) or, in some scenarios, execute arbitrary code."], "name": "CVE-2026-64011", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64011\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64011\nhttps://lore.kernel.org/linux-cve-announce/2026071909-CVE-2026-64011-41cb@gregkh/T"], "threat_severity": "Moderate"}