CVE - CVE-2024-57876

CVE-ID
CVE-2024-57876	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/94b33b2d7640e807869451384eb88321dd0ffbd4 URL:https://git.kernel.org/stable/c/94b33b2d7640e807869451384eb88321dd0ffbd4 MISC:https://git.kernel.org/stable/c/a6fa67d26de385c3c7a23c1e109a0e23bfda4ec7 URL:https://git.kernel.org/stable/c/a6fa67d26de385c3c7a23c1e109a0e23bfda4ec7 MISC:https://git.kernel.org/stable/c/be826b4451fd187a7c0b04be4f8243d5df6e0450 URL:https://git.kernel.org/stable/c/be826b4451fd187a7c0b04be4f8243d5df6e0450 MISC:https://git.kernel.org/stable/c/d834d20d2e86c52ed5cab41763fa61e6071680ef URL:https://git.kernel.org/stable/c/d834d20d2e86c52ed5cab41763fa61e6071680ef
Assigning CNA
kernel.org
Date Record Created
20250111	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250111)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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