What is CVE-2025-68193?

CVE-2025-68193 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.10 onward and patched in 6.17.8 and 6.18. CVE-2025-68193 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-68193?

CVE-2025-68193 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2025-68193?

Yes, CVE-2025-68193 has been patched. Fixed versions include 6.17.8 and 6.18. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-68193 actively exploited?

CVE-2025-68193 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-68193

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.

Package Linux Kernel

Published 2025-12-16

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.17.8, 6.18 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.17.8 6.17.x ✓ 6.18

References

The following references provide additional information about CVE-2025-68193 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/52faa05fcd9f78af99abebe30a4b7b444744c991
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ee4b32220a6b41e71512e8804585325e685456ba
Patch

Frequently asked questions

What is CVE-2025-68193?

CVE-2025-68193 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.10 onward and has been patched in 6.17.8 and 6.18. CVE-2025-68193 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2025-68193?

Yes — CVE-2025-68193 has been patched. Fixed versions include 6.17.8 and 6.18. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-68193 actively exploited?

No — CVE-2025-68193 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.