CVE-2025-68193
Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe/guc: Add devm release action to safely tear down CT When a buffer object (BO) is allocated with the XE_BO_FLAG_GGTT_INVALIDATE flag, the driver initiates TLB invalidation requests via the CTB mechanism while releasing the BO. However a premature release of the CTB BO can lead to system crashes, as observed in: Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:h2g_write+0x2f3/0x7c0 [xe] Call Trace: guc_ct_send_locked+0x8b/0x670 [xe] xe_guc_ct_send_locked+0x19/0x60 [xe] send_tlb_invalidation+0xb4/0x460 [xe] xe_gt_tlb_invalidation_ggtt+0x15e/0x2e0 [xe] ggtt_invalidate_gt_tlb.part.0+0x16/0x90 [xe] ggtt_node_remove+0x110/0x140 [xe] xe_ggtt_node_remove+0x40/0xa0 [xe] xe_ggtt_remove_bo+0x87/0x250 [xe] Introduce a devm-managed release action during xe_guc_ct_init() and xe_guc_ct_init_post_hwconfig() to ensure proper CTB disablement before resource deallocation, preventing the use-after-free scenario.
How to fix
- Linux Linuxfd4e41545d5955e6f7b4a0c4b56d21010ce8e812, 52faa05fcd9f78af99abebe30a4b7b444744c991, ee4b32220a6b41e71512e8804585325e685456ba or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 231c4110873a5db4975512c30aa10edcc5be56e2 ≤ v < fd4e41545d5955e6f7b4a0c4b56d21010ce8e812, 231c4110873a5db4975512c30aa10edcc5be56e2 ≤ v < 52faa05fcd9f78af99abebe30a4b7b444744c991, 231c4110873a5db4975512c30aa10edcc5be56e2 ≤ v < ee4b32220a6b41e71512e8804585325e685456ba, 6.10 | fd4e41545d5955e6f7b4a0c4b56d21010ce8e812, 52faa05fcd9f78af99abebe30a4b7b444744c991, ee4b32220a6b41e71512e8804585325e685456ba |
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