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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 16, 2025 |
| Ubuntu | — | Upgrade linux-image-gcp-64kUpgrade linux-image-raspiUpgrade linux-image-aws-6.17Upgrade linux-image-gcpUpgrade linux-image-generic-64k-6.17Upgrade linux-image-aws-64kUpgrade linux-image-genericUpgrade linux-image-oracle-64kUpgrade linux-image-raspi-6.17Upgrade linux-image-azureUpgrade linux-image-realtime-6.17Upgrade linux-image-azure-6.17Upgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-virtual-6.17Upgrade linux-image-aws-64k-6.17Upgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.17.0-14-genericUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-oem-6.17Upgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-6.17.0-1008-azureUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-gcp-6.17Upgrade linux-image-6.17.0-1011-oemUpgrade linux-image-virtualUpgrade linux-image-oracleUpgrade linux-image-generic-6.17Upgrade linux-image-awsUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-realtimeUpgrade linux-image-6.17.0-1008-raspi | Feb 13, 2026 | Feb 12, 2026 |
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