{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"b1d05cc61dfa6c4bd5e67855bec6a03e955f512d","status":"affected","version":"5f57a96e92c60f62da91d58ceb5e5acd40e7d594","versionType":"git"},{"lessThan":"4ed6d08c4a59ee6a8cb806347f6d9873de5d229e","status":"affected","version":"dbaeef363ea54f4c18112874b77503c72ba60fec","versionType":"git"},{"lessThan":"8c6d84a54823cd839e6ce22af559925f1320c310","status":"affected","version":"dbaeef363ea54f4c18112874b77503c72ba60fec","versionType":"git"},{"lessThan":"afdff9103818656627920c21822e48a6dae2906f","status":"affected","version":"dbaeef363ea54f4c18112874b77503c72ba60fec","versionType":"git"},{"lessThan":"613059875958e7b217b250ed14c3b189f9488421","status":"affected","version":"dbaeef363ea54f4c18112874b77503c72ba60fec","versionType":"git"},{"lessThan":"6.6.148","status":"affected","version":"6.6.86","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-68429","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe()\n\nA hotplug or link-loss event can tear down the MST topology\n(setting mgr->mst_state = false and mgr->mst_primary = NULL) concurrently\nwith a caller invoking drm_dp_mst_topology_queue_probe(). Since the check\nis already performed under mgr->lock, the condition is not a programming\nerror but a valid race -- the topology was valid when the caller decided\nto call this function, but was torn down before the lock was acquired.\n\nReplace the drm_WARN_ON() with a graceful early return. This eliminates\nspurious kernel warnings and the resulting compositor crashes observed\nwhen connecting/disconnecting DP MST monitors, while keeping the correct\nbehavior of doing nothing when MST is not active. A drm_dbg_mst() trace\nis added so the skipped probe remains observable under MST debug logging.\n\nThe existing WARN_ON(mgr->mst_primary) in drm_dp_mst_topology_mgr_set_mst()\nalready catches the case where the topology is initialized twice, so no\ndiagnostic coverage is lost.","epss":{"date":"2026-11-06","percentile":0.06243,"score":0.00168},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793985573053,"publishedAt":1786493234640,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/b1d05cc61dfa6c4bd5e67855bec6a03e955f512d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4ed6d08c4a59ee6a8cb806347f6d9873de5d229e"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/8c6d84a54823cd839e6ce22af559925f1320c310"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/afdff9103818656627920c21822e48a6dae2906f"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/613059875958e7b217b250ed14c3b189f9488421"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/4ed6d08c4a59ee6a8cb806347f6d9873de5d229e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/613059875958e7b217b250ed14c3b189f9488421"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/8c6d84a54823cd839e6ce22af559925f1320c310"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/afdff9103818656627920c21822e48a6dae2906f"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/b1d05cc61dfa6c4bd5e67855bec6a03e955f512d"}],"remediation":[],"revision":"b66a7867967b7fa09eab7295585ee4fc6ec0a9b7f7b9e53c86c072dd2896ae34","sources":[{"modifiedAt":1793984116587,"name":"CNA: Linux","retrievedAt":1793986003416,"url":"https://www.cve.org/CVERecord?id=CVE-2026-68429"},{"modifiedAt":1793985573053,"name":"NVD","retrievedAt":1793989652965,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68429"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793986039530,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-68429"}],"ssvc":{"assessedAt":1793983762194,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"drm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe()","updatedAt":1793989652965}