CVE-2026-46267 (GCVE-0-2026-46267)
Vulnerability from cvelistv5 – Published: 2026-06-03 15:50 – Updated: 2026-06-03 15:50
VLAI
EPSS
VEX
Title
nfc: hci: shdlc: Stop timers and work before freeing context
Summary
In the Linux kernel, the following vulnerability has been resolved:
nfc: hci: shdlc: Stop timers and work before freeing context
llc_shdlc_deinit() purges SHDLC skb queues and frees the llc_shdlc
structure while its timers and state machine work may still be active.
Timer callbacks can schedule sm_work, and sm_work accesses SHDLC state
and the skb queues. If teardown happens in parallel with a queued/running
work item, it can lead to UAF and other shutdown races.
Stop all SHDLC timers and cancel sm_work synchronously before purging the
queues and freeing the context.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Severity
7.8 (High)
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
4a61cd6687fc6348d08724676d34e38160d6cf9b , < c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e
(git)
Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < a24a676329d40481b2331bfa1418a679577dfd3a (git) Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 77eef9f2eef045c3c37a3df82d3e661afb866b98 (git) Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < cf70cedce327833296ebe6043364d1e44b76a2ab (git) Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 276820278e9717cc7d4bb32381892dd3ddf418d4 (git) Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < 1cb97b1225450af3f7b728777929ba50c6a58ced (git) Affected: 4a61cd6687fc6348d08724676d34e38160d6cf9b , < c9efde1e537baed7648a94022b43836a348a074f (git) |
guessed | |
| Linux | Linux |
Affected:
3.7
Unaffected: 0 , < 3.7 (semver) Unaffected: 5.15.202 , ≤ 5.15.* (semver) Unaffected: 6.1.165 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.14 , ≤ 6.18.* (semver) Unaffected: 6.19.4 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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"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."
}
],
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{
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{
"url": "https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"
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"dateReserved": "2026-05-13T15:03:33.108Z",
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"date": "2026-09-14",
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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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/nfc/hci/llc_shdlc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"a24a676329d40481b2331bfa1418a679577dfd3a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"77eef9f2eef045c3c37a3df82d3e661afb866b98\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"cf70cedce327833296ebe6043364d1e44b76a2ab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"276820278e9717cc7d4bb32381892dd3ddf418d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"1cb97b1225450af3f7b728777929ba50c6a58ced\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4a61cd6687fc6348d08724676d34e38160d6cf9b\",\"lessThan\":\"c9efde1e537baed7648a94022b43836a348a074f\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/nfc/hci/llc_shdlc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.202\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.165\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.128\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.75\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.14\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.4\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.7\",\"versionEndExcluding\":\"5.15.202\",\"matchCriteriaId\":\"121A36DD-C173-453C-8437-6A634B06F4D3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.165\",\"matchCriteriaId\":\"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.128\",\"matchCriteriaId\":\"851E9353-6C09-4CC9-877E-E09DB164A3C2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.75\",\"matchCriteriaId\":\"BCE16369-98ED-41CF-8995-DFDC10B288D2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.14\",\"matchCriteriaId\":\"BF463CB7-1F58-4607-B847-77ED23E4B9B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.4\",\"matchCriteriaId\":\"672A3E79-EC03-479D-8503-361DFBDC8092\"}]}]}],\"references\":[{\"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/stab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"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-06-28T11:38:53+00:00",
"cve": "CVE-2026-46267",
"id": "CVE-2026-46267",
"initial_release_date": "2026-06-03T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: nfc: hci: shdlc: Stop timers and work before freeing context",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46267.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T01:10:26Z",
"cve": "CVE-2026-46267",
"id": "CVE-2026-46267",
"initial_release_date": "2026-06-04T02:21:42Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "699",
"product_status:known_not_affected": "21",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46267",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46267.json",
"version": "10"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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