CVE-2024-57876: Linux Kernel

High severity, CVSS 7.0. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: drm/dp_mst: Fix resetting msg rx state after topology removal If the MST topology is removed during the reception of an MST down reply or MST up request sideband message, the drm_dp_mst_topology_mgr::up_req_recv/down_rep_recv states could be reset from one thread via drm_dp_mst_topology_mgr_set_mst(false), racing with the reading/parsing of the message from another thread via drm_dp_mst_handle_down_rep() or drm_dp_mst_handle_up_req(). The race is possible since the reader/parser doesn't hold any lock while accessing the reception state. This in turn can lead to a memory corruption in the reader/parser as described by commit bd2fccac61b4 ("drm/dp_mst: Fix MST sideband message body length check"). Fix the above by resetting the message reception state if needed before reading/parsing a message. Another solution would be to hold the drm_dp_mst_topology_mgr::lock for the whole duration of the message reception/parsing in drm_dp_mst_handle_down_rep() and drm_dp_mst_handle_up_req(), however this would require a bigger change. Since the fix is also needed for stable, opting for the simpler solution in this patch.

Affected products

• Linux Linux Kernel: from 5.10.173, before 5.11 (fixed in 5.11); from 5.15.100, before 5.16 (fixed in 5.16); from 6.1.18, before 6.1.120 (fixed in 6.1.120); from 6.2.5, before 6.6.66 (fixed in 6.6.66); from 6.7, before 6.12.5 (fixed in 6.12.5); version 6.13 only

Published 2025-01-11. Last modified 2026-06-17.