CVE-2026-98580

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98580", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.358Z", "datePublished": "2026-10-18T15:18:53.819Z", "dateUpdated": "2026-10-19T09:22:05.887Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:05.887Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: Fix race condition in accept_queue lifecycle\n\nIn nfc_llcp_socket_release(), sockets and listener accept queues are\nwalked under the local sockets rwlock and bh_lock_sock(). However,\nbh_lock_sock() does not synchronise against process-context lock_sock()\nheld by nfc_llcp_accept_dequeue() during accept(). Because\nsocket_release() does not check sock_owned_by_user(), both paths can\nconcurrently unlink and release the same child socket, resulting in\nuse-after-free or a NULL pointer dereference of child->parent in\nnfc_llcp_accept_unlink().\n\nFix this synchronisation race by having nfc_llcp_socket_release() use\nprocess-context lock_sock() instead of bh_lock_sock():\n\n1. Pop sockets from the local sockets list under the write lock using\n nfc_llcp_sock_list_pop() so lock_sock() can be acquired without\n holding the rwlock.\n\n2. Because lock_sock() can sleep, defer the final release of the\n nfc_llcp_local structure to a workqueue (release_work). This avoids\n a sleeping-in-atomic bug when the last local reference is dropped\n from softirq context. Additionally, hold a single device reference\n on local from registration until final destruction.\n\n3. In nfc_llcp_local_get(), use kref_get_unless_zero() to prevent\n resurrecting a local object whose teardown has been scheduled.\n\n4. In llcp_sock_accept(), verify that the listener socket state is still\n LLCP_LISTEN after waking from schedule_timeout() to prevent hangs if\n the listener is closed concurrently.\n\n5. When unlinking unaccepted child sockets during listener release,\n unlink them from local->sockets, call sock_orphan(), and drop their\n initial sk_alloc creation reference via sock_put().\n\n6. Make nfc_llcp_accept_unlink() idempotent by guarding parent access with\n a NULL check."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/llcp.h", "net/nfc/llcp_core.c", "net/nfc/llcp_sock.c"], "versions": [{"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "54adcabb0f1deef1bdae5fc64779ed6d442721c9", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "7c938aad5108382c6ad7453c4b5ee8ae3f3252ed", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "d2093a0981138876212bc5f473bdbfba0786e064", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "41256821762a7114906b178826d17098e2fa5992", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "53867f6acb1af7f12d6485fa8a2819318f89083b", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "da8a07757383614a8380a0f7dd54749d2687b82e", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "d5e1c92d09caed19f2988739695ce611a86ba6f8", "status": "affected", "versionType": "git"}, {"version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "lessThan": "c3eef2f988a3db9690369d7cef9a3344dd9788d3", "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/nfc/llcp.h", "net/nfc/llcp_core.c", "net/nfc/llcp_sock.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "3.7", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/54adcabb0f1deef1bdae5fc64779ed6d442721c9"}, {"url": "https://git.kernel.org/stable/c/7c938aad5108382c6ad7453c4b5ee8ae3f3252ed"}, {"url": "https://git.kernel.org/stable/c/d2093a0981138876212bc5f473bdbfba0786e064"}, {"url": "https://git.kernel.org/stable/c/41256821762a7114906b178826d17098e2fa5992"}, {"url": "https://git.kernel.org/stable/c/53867f6acb1af7f12d6485fa8a2819318f89083b"}, {"url": "https://git.kernel.org/stable/c/da8a07757383614a8380a0f7dd54749d2687b82e"}, {"url": "https://git.kernel.org/stable/c/d5e1c92d09caed19f2988739695ce611a86ba6f8"}, {"url": "https://git.kernel.org/stable/c/c3eef2f988a3db9690369d7cef9a3344dd9788d3"}], "title": "nfc: llcp: Fix race condition in accept_queue lifecycle", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/nfc/llcp.h", "net/nfc/llcp_core.c", "net/nfc/llcp_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "54adcabb0f1deef1bdae5fc64779ed6d442721c9", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "7c938aad5108382c6ad7453c4b5ee8ae3f3252ed", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "d2093a0981138876212bc5f473bdbfba0786e064", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "41256821762a7114906b178826d17098e2fa5992", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "53867f6acb1af7f12d6485fa8a2819318f89083b", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "da8a07757383614a8380a0f7dd54749d2687b82e", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "d5e1c92d09caed19f2988739695ce611a86ba6f8", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}, {"lessThan": "c3eef2f988a3db9690369d7cef9a3344dd9788d3", "status": "affected", "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/nfc/llcp.h", "net/nfc/llcp_core.c", "net/nfc/llcp_sock.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.7"}, {"lessThan": "3.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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 race condition in accept_queue lifecycle\n\nIn nfc_llcp_socket_release(), sockets and listener accept queues are\nwalked under the local sockets rwlock and bh_lock_sock(). However,\nbh_lock_sock() does not synchronise against process-context lock_sock()\nheld by nfc_llcp_accept_dequeue() during accept(). Because\nsocket_release() does not check sock_owned_by_user(), both paths can\nconcurrently unlink and release the same child socket, resulting in\nuse-after-free or a NULL pointer dereference of child->parent in\nnfc_llcp_accept_unlink().\n\nFix this synchronisation race by having nfc_llcp_socket_release() use\nprocess-context lock_sock() instead of bh_lock_sock():\n\n1. Pop sockets from the local sockets list under the write lock using\n nfc_llcp_sock_list_pop() so lock_sock() can be acquired without\n holding the rwlock.\n\n2. Because lock_sock() can sleep, defer the final release of the\n nfc_llcp_local structure to a workqueue (release_work). This avoids\n a sleeping-in-atomic bug when the last local reference is dropped\n from softirq context. Additionally, hold a single device reference\n on local from registration until final destruction.\n\n3. In nfc_llcp_local_get(), use kref_get_unless_zero() to prevent\n resurrecting a local object whose teardown has been scheduled.\n\n4. In llcp_sock_accept(), verify that the listener socket state is still\n LLCP_LISTEN after waking from schedule_timeout() to prevent hangs if\n the listener is closed concurrently.\n\n5. When unlinking unaccepted child sockets during listener release,\n unlink them from local->sockets, call sock_orphan(), and drop their\n initial sk_alloc creation reference via sock_put().\n\n6. Make nfc_llcp_accept_unlink() idempotent by guarding parent access with\n a NULL check."}], "id": "CVE-2026-98580", "lastModified": "2026-10-19T10:19:18.640", "metrics": {}, "published": "2026-10-18T16:17:10.483", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/41256821762a7114906b178826d17098e2fa5992"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53867f6acb1af7f12d6485fa8a2819318f89083b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54adcabb0f1deef1bdae5fc64779ed6d442721c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7c938aad5108382c6ad7453c4b5ee8ae3f3252ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3eef2f988a3db9690369d7cef9a3344dd9788d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2093a0981138876212bc5f473bdbfba0786e064"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5e1c92d09caed19f2988739695ce611a86ba6f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da8a07757383614a8380a0f7dd54749d2687b82e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: nfc: llcp: Fix race condition in accept_queue lifecycle", "id": "2554909", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554909"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnfc: llcp: Fix race condition in accept_queue lifecycle\nIn nfc_llcp_socket_release(), sockets and listener accept queues are\nwalked under the local sockets rwlock and bh_lock_sock(). However,\nbh_lock_sock() does not synchronise against process-context lock_sock()\nheld by nfc_llcp_accept_dequeue() during accept(). Because\nsocket_release() does not check sock_owned_by_user(), both paths can\nconcurrently unlink and release the same child socket, resulting in\nuse-after-free or a NULL pointer dereference of child->parent in\nnfc_llcp_accept_unlink().\nFix this synchronisation race by having nfc_llcp_socket_release() use\nprocess-context lock_sock() instead of bh_lock_sock():\n1. Pop sockets from the local sockets list under the write lock using\nnfc_llcp_sock_list_pop() so lock_sock() can be acquired without\nholding the rwlock.\n2. Because lock_sock() can sleep, defer the final release of the\nnfc_llcp_local structure to a workqueue (release_work). This avoids\na sleeping-in-atomic bug when the last local reference is dropped\nfrom softirq context. Additionally, hold a single device reference\non local from registration until final destruction.\n3. In nfc_llcp_local_get(), use kref_get_unless_zero() to prevent\nresurrecting a local object whose teardown has been scheduled.\n4. In llcp_sock_accept(), verify that the listener socket state is still\nLLCP_LISTEN after waking from schedule_timeout() to prevent hangs if\nthe listener is closed concurrently.\n5. When unlinking unaccepted child sockets during listener release,\nunlink them from local->sockets, call sock_orphan(), and drop their\ninitial sk_alloc creation reference via sock_put().\n6. Make nfc_llcp_accept_unlink() idempotent by guarding parent access with\na NULL check.", "A flaw was found in the Linux kernel's Near Field Communication (NFC) Logical Link Control Protocol (LLCP) implementation. A race condition occurs during concurrent socket release and connection accept operations due to improper lock synchronization. A local attacker could exploit this flaw to cause a use-after-free or null-pointer dereference, leading to a denial of service (DoS) or potentially privilege escalation."], "name": "CVE-2026-98580", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98580\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98580\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98580.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,54adcabb0f1deef1bdae5fc64779ed6d442721c9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,7c938aad5108382c6ad7453c4b5ee8ae3f3252ed)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,d2093a0981138876212bc5f473bdbfba0786e064)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,41256821762a7114906b178826d17098e2fa5992)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,53867f6acb1af7f12d6485fa8a2819318f89083b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,da8a07757383614a8380a0f7dd54749d2687b82e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,d5e1c92d09caed19f2988739695ce611a86ba6f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[50b78b2a6500d0e97c204c1b6c51df8c17358bbe,c3eef2f988a3db9690369d7cef9a3344dd9788d3)"}}], "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": "generic", "value": "3.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T18:00:10.133797+00:00", "updated": "2026-10-22T22:30:13.429200+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}