{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-98580", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98580", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-10-18T15:18:53.819Z", "updatedAt": "2026-10-19T09:22:05.887Z", "importedAt": "2026-10-24T01:58:41.756Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "nfc: llcp: Fix race condition in accept_queue lifecycle", "summary": "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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "54adcabb0f1deef1bdae5fc64779ed6d442721c9" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "7c938aad5108382c6ad7453c4b5ee8ae3f3252ed" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "d2093a0981138876212bc5f473bdbfba0786e064" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "41256821762a7114906b178826d17098e2fa5992" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "53867f6acb1af7f12d6485fa8a2819318f89083b" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "da8a07757383614a8380a0f7dd54749d2687b82e" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "d5e1c92d09caed19f2988739695ce611a86ba6f8" }, { "version": "50b78b2a6500d0e97c204c1b6c51df8c17358bbe", "status": "affected", "versionType": "git", "lessThan": "c3eef2f988a3db9690369d7cef9a3344dd9788d3" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.7", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.7" }, { "version": "5.10.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.222", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.189", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.158", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.112", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.55", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }