CVE-2024-57798 - Linux Kernel: intel drm_dp_mst Use After Free Vuln

CVE-2024-57798 - Linux Kernel: intel drm_dp_mst Use After Free Vuln

https://cvefeed.io/rssfeed/latest.atom / Sat, 01/11/2025 - 15:34
CVE ID : CVE-2024-57798
Published : Jan. 11, 2025, 1:15 p.m. | 1 hour, 18 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req() While receiving an MST up request message from one thread in drm_dp_mst_handle_up_req(), the MST topology could be removed from another thread via drm_dp_mst_topology_mgr_set_mst(false), freeing mst_primary and setting drm_dp_mst_topology_mgr::mst_primary to NULL. This could lead to a NULL deref/use-after-free of mst_primary in drm_dp_mst_handle_up_req(). Avoid the above by holding a reference for mst_primary in drm_dp_mst_handle_up_req() while it's used. v2: Fix kfreeing the request if getting an mst_primary reference fails.
Severity: 0.0 | NA
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