{"id":"CVE-2024-57798","summary":"drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req()\n\nWhile receiving an MST up request message from one thread in\ndrm_dp_mst_handle_up_req(), the MST topology could be removed from\nanother thread via drm_dp_mst_topology_mgr_set_mst(false), freeing\nmst_primary and setting drm_dp_mst_topology_mgr::mst_primary to NULL.\nThis could lead to a NULL deref/use-after-free of mst_primary in\ndrm_dp_mst_handle_up_req().\n\nAvoid the above by holding a reference for mst_primary in\ndrm_dp_mst_handle_up_req() while it's used.\n\nv2: Fix kfreeing the request if getting an mst_primary reference fails.","modified":"2026-04-02T12:25:17.491653Z","published":"2025-01-11T12:39:48.212Z","related":["MGASA-2025-0030","MGASA-2025-0032","SUSE-SU-2025:0289-1","SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0555-1","SUSE-SU-2025:0556-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:0576-1","SUSE-SU-2025:0577-1","SUSE-SU-2025:0577-2","SUSE-SU-2025:0771-1","SUSE-SU-2025:0867-1","SUSE-SU-2025:20165-1","SUSE-SU-2025:20166-1","SUSE-SU-2025:20248-1","SUSE-SU-2025:20249-1","USN-7379-2","USN-7380-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/57xxx/CVE-2024-57798.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/9735d40f5fde9970aa46e828ecc85c32571d58a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce55818b2d3a999f886af91679589e4644ff1dc8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e54b00086f7473dbda1a7d6fc47720ced157c6a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f61b2e5e7821f868d6afc22382a66a30ee780ba0"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/57xxx/CVE-2024-57798.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-57798"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9408cc94eb041d0c2f9f00189a613b94c0449450"},{"fixed":"f61b2e5e7821f868d6afc22382a66a30ee780ba0"},{"fixed":"9735d40f5fde9970aa46e828ecc85c32571d58a2"},{"fixed":"ce55818b2d3a999f886af91679589e4644ff1dc8"},{"fixed":"e54b00086f7473dbda1a7d6fc47720ced157c6a8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-57798.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}