{"id":"CVE-2026-46267","state":"PUBLISHED","title":"nfc: hci: shdlc: Stop timers and work before freeing context","description":"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.","publishedAt":"2026-06-03T15:50:09.035Z","updatedAt":"2026-06-03T15:50:09.035Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"a24a676329d40481b2331bfa1418a679577dfd3a","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"77eef9f2eef045c3c37a3df82d3e661afb866b98","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"cf70cedce327833296ebe6043364d1e44b76a2ab","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"276820278e9717cc7d4bb32381892dd3ddf418d4","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"1cb97b1225450af3f7b728777929ba50c6a58ced","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"c9efde1e537baed7648a94022b43836a348a074f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/hci/llc_shdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/hci/llc_shdlc.c"]}],"references":["https://git.kernel.org/stable/c/c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e","https://git.kernel.org/stable/c/a24a676329d40481b2331bfa1418a679577dfd3a","https://git.kernel.org/stable/c/77eef9f2eef045c3c37a3df82d3e661afb866b98","https://git.kernel.org/stable/c/cf70cedce327833296ebe6043364d1e44b76a2ab","https://git.kernel.org/stable/c/276820278e9717cc7d4bb32381892dd3ddf418d4","https://git.kernel.org/stable/c/1cb97b1225450af3f7b728777929ba50c6a58ced","https://git.kernel.org/stable/c/c9efde1e537baed7648a94022b43836a348a074f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46267.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46267","state":"PUBLISHED","datePublished":"2026-06-03T15:50:09.035Z","dateUpdated":"2026-06-03T15:50:09.035Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.108Z"},"containers":{"cna":{"title":"nfc: hci: shdlc: Stop timers and work before freeing context","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"c60f41022eaad2a1dafecd3ae6f249a3bd6d4b6e","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"a24a676329d40481b2331bfa1418a679577dfd3a","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"77eef9f2eef045c3c37a3df82d3e661afb866b98","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"cf70cedce327833296ebe6043364d1e44b76a2ab","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"276820278e9717cc7d4bb32381892dd3ddf418d4","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"1cb97b1225450af3f7b728777929ba50c6a58ced","versionType":"git"},{"version":"4a61cd6687fc6348d08724676d34e38160d6cf9b","status":"affected","lessThan":"c9efde1e537baed7648a94022b43836a348a074f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/hci/llc_shdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.7","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.14","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.4","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/nfc/hci/llc_shdlc.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-03T15:50:09.035Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}