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.
Metrics
Affected Vendors & Products
References
History
Tue, 14 Jan 2025 08:45:00 +0000
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threat_severity
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cvssV3_1
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Sat, 11 Jan 2025 12:45:00 +0000
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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. | |
Title | drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req() | |
References |
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2025-01-11T12:39:48.212Z
Updated: 2025-01-11T12:39:48.212Z
Reserved: 2025-01-11T12:32:49.420Z
Link: CVE-2024-57798
Vulnrichment
No data.
NVD
Status : Received
Published: 2025-01-11T13:15:29.743
Modified: 2025-01-11T13:15:29.743
Link: CVE-2024-57798
Redhat