{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5f57a96e92c60f62da91d58ceb5e5acd40e7d594"
            },
            {
              "fixed": "b1d05cc61dfa6c4bd5e67855bec6a03e955f512d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "dbaeef363ea54f4c18112874b77503c72ba60fec"
            },
            {
              "fixed": "4ed6d08c4a59ee6a8cb806347f6d9873de5d229e"
            },
            {
              "fixed": "8c6d84a54823cd839e6ce22af559925f1320c310"
            },
            {
              "fixed": "afdff9103818656627920c21822e48a6dae2906f"
            },
            {
              "fixed": "613059875958e7b217b250ed14c3b189f9488421"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.86"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68429.json"
  },
  "details": "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-\u003emst_state = false and mgr-\u003emst_primary = NULL) concurrently\nwith a caller invoking drm_dp_mst_topology_queue_probe(). Since the check\nis already performed under mgr-\u003elock, 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-\u003emst_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.",
  "id": "CVE-2026-68429",
  "modified": "2026-08-13T03:52:00.801812380Z",
  "published": "2026-08-12T00:07:14.640Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ed6d08c4a59ee6a8cb806347f6d9873de5d229e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/613059875958e7b217b250ed14c3b189f9488421"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c6d84a54823cd839e6ce22af559925f1320c310"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/afdff9103818656627920c21822e48a6dae2906f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1d05cc61dfa6c4bd5e67855bec6a03e955f512d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68429.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68429"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/dp_mst: Handle torn-down topology gracefully in drm_dp_mst_topology_queue_probe()"
}