CVE-2024-57798

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9408cc94eb041d0c2f9f00189a613b94c0449450 < f61b2e5e7821f868d6afc22382a66a30ee780ba0affected
LinuxLinux9408cc94eb041d0c2f9f00189a613b94c0449450 < 9735d40f5fde9970aa46e828ecc85c32571d58a2affected
LinuxLinux9408cc94eb041d0c2f9f00189a613b94c0449450 < ce55818b2d3a999f886af91679589e4644ff1dc8affected
LinuxLinux9408cc94eb041d0c2f9f00189a613b94c0449450 < e54b00086f7473dbda1a7d6fc47720ced157c6a8affected
LinuxLinux5.5affected
LinuxLinux0 < 5.5unaffected
LinuxLinux6.1.123 <= 6.1.*unaffected
LinuxLinux6.6.69 <= 6.6.*unaffected
LinuxLinux6.12.8 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References