CVE-2024-57876 (GCVE-0-2024-57876)

Vulnerability from cvelistv5 – Published: 2025-01-11 14:49 – Updated: 2025-11-03 20:54
VLAI?
Title
drm/dp_mst: Fix resetting msg rx state after topology removal
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b30fcedeba643ca16eaa6212c1245598b7cd830d , < 94b33b2d7640e807869451384eb88321dd0ffbd4 (git)
Affected: 1d082618bbf3b6755b8cc68c0a8122af2842d593 , < d834d20d2e86c52ed5cab41763fa61e6071680ef (git)
Affected: 1d082618bbf3b6755b8cc68c0a8122af2842d593 , < be826b4451fd187a7c0b04be4f8243d5df6e0450 (git)
Affected: 1d082618bbf3b6755b8cc68c0a8122af2842d593 , < a6fa67d26de385c3c7a23c1e109a0e23bfda4ec7 (git)
Affected: ee4a4282d78d96e07e714c28ca54679713fa2157 (git)
Affected: db35e49413a4d03ea0c003598803e49956f59324 (git)
Affected: a579ed4613b5a64074963988ad481e43cf3b917b (git)
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    Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.66 , ≤ 6.6.* (semver)
Unaffected: 6.12.5 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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