ghsa-3gjf-8gc5-3w3x
Vulnerability from github
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": [],
"aliases": [
"CVE-2024-57876"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-11T15:15:07Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/dp_mst: Fix resetting msg rx state after topology removal\n\nIf the MST topology is removed during the reception of an MST down reply\nor MST up request sideband message, the\ndrm_dp_mst_topology_mgr::up_req_recv/down_rep_recv states could be reset\nfrom one thread via drm_dp_mst_topology_mgr_set_mst(false), racing with\nthe reading/parsing of the message from another thread via\ndrm_dp_mst_handle_down_rep() or drm_dp_mst_handle_up_req(). The race is\npossible since the reader/parser doesn\u0027t hold any lock while accessing\nthe reception state. This in turn can lead to a memory corruption in the\nreader/parser as described by commit bd2fccac61b4 (\"drm/dp_mst: Fix MST\nsideband message body length check\").\n\nFix the above by resetting the message reception state if needed before\nreading/parsing a message. Another solution would be to hold the\ndrm_dp_mst_topology_mgr::lock for the whole duration of the message\nreception/parsing in drm_dp_mst_handle_down_rep() and\ndrm_dp_mst_handle_up_req(), however this would require a bigger change.\nSince the fix is also needed for stable, opting for the simpler solution\nin this patch.",
"id": "GHSA-3gjf-8gc5-3w3x",
"modified": "2025-01-11T15:30:30Z",
"published": "2025-01-11T15:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57876"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/94b33b2d7640e807869451384eb88321dd0ffbd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a6fa67d26de385c3c7a23c1e109a0e23bfda4ec7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/be826b4451fd187a7c0b04be4f8243d5df6e0450"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d834d20d2e86c52ed5cab41763fa61e6071680ef"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
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