CVE-2026-46267

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46267", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.108Z", "datePublished": "2026-06-03T15:50:09.035Z", "dateUpdated": "2026-06-03T15:50:09.035Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-03T15:50:09.035Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: hci: shdlc: Stop timers and work before freeing context\n\nllc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc\nstructure while its timers and state machine work may still be active.\n\nTimer callbacks can schedule sm_work, and sm_work accesses SHDLC state\nand the skb queues. If teardown happens in parallel with a queued/running\nwork item, it can lead to UAF and other shutdown races.\n\nStop all SHDLC timers and cancel sm_work synchronously before purging the\nqueues and freeing the context.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/hci/llc_shdlc.c"], "versions": [{"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "a24a676329d40481b2331bfa1418a679577dfd3a", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "77eef9f2eef045c3c37a3df82d3e661afb866b98", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "cf70cedce327833296ebe6043364d1e44b76a2ab", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "276820278e9717cc7d4bb32381892dd3ddf418d4", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "1cb97b1225450af3f7b728777929ba50c6a58ced", "status": "affected", "versionType": "git"}, {"version": "4a61cd6687fc6348d08724676d34e38160d6cf9b", "lessThan": "c9efde1e537baed7648a94022b43836a348a074f", "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/hci/llc_shdlc.c"], "versions": [{"version": "3.7", "status": "affected"}, {"version": "0", "lessThan": "3.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.7", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e"}, {"url": "https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a"}, {"url": "https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98"}, {"url": "https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab"}, {"url": "https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4"}, {"url": "https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced"}, {"url": "https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"}], "title": "nfc: hci: shdlc: Stop timers and work before freeing context", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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If teardown happens in parallel with a queued/running\nwork item, it can lead to UAF and other shutdown races.\n\nStop all SHDLC timers and cancel sm_work synchronously before purging the\nqueues and freeing the context.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnfc: hci: shdlc: Detener temporizadores y trabajo antes de liberar el contexto\n\nllc_shdlc_deinit() purga las colas skb de SHDLC y libera la estructura llc_shdlc mientras sus temporizadores y el trabajo de la m\u00e1quina de estados a\u00fan pueden estar activos.\n\nLas devoluciones de llamada del temporizador pueden programar sm_work, y sm_work accede al estado de SHDLC y a las colas skb. Si el desmantelamiento ocurre en paralelo con un elemento de trabajo en cola/en ejecuci\u00f3n, puede llevar a UAF y otras condiciones de carrera de apagado.\n\nDetener todos los temporizadores SHDLC y cancelar sm_work sincr\u00f3nicamente antes de purgar las colas y liberar el contexto.\n\nEncontrado por Linux Verification Center (linuxtesting.org) con SVACE."}], "id": "CVE-2026-46267", "lastModified": "2026-07-22T20:10:00.127", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-06-03T18:16:28.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nfc: hci: shdlc: Stop timers and work before freeing context", "id": "2484467", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484467"}, "csaw": false, "cwe": "CWE-364", "details": ["A flaw was found in the Linux kernel's Near Field Communication (NFC) Host Controller Interface (HCI) Synchronous High-level Data Link Control (SHDLC) subsystem. This vulnerability arises because timers and work items can remain active and access freed SHDLC state and data queues during the deinitialization process (`llc_shdlc_deinit()`). This can lead to a Use-After-Free (UAF) condition and other shutdown race issues, potentially causing system instability or crashes."], "name": "CVE-2026-46267", "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"}], "public_date": "2026-06-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46267\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46267\nhttps://lore.kernel.org/linux-cve-announce/2026060338-CVE-2026-46267-5845@gregkh/T"]}

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