VulnerabilityPublished 16 Dec 2025Updated 21 Oct 2026

CVE-2025-68193: Linux kernel · drm/xe/guc: Add devm release action to safely tear down CT

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in fd4e41545d5955e6f7b4a0c4b56d21010ce8e812 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fd4e41545d5955e6f7b4a0c4b56d21010ce8e812, ee4b32220a6b41e71512e8804585325e685456ba, 52faa05fcd9f78af99abebe30a4b7b444744c991

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to fd4e41545d5955e6f7b4a0c4b56d21010ce8e812, ee4b32220a6b41e71512e8804585325e685456ba or 52faa05fcd9f78af99abebe30a4b7b444744c991.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 231c4110873a5db4975512c30aa10edcc5be56e2, < fd4e41545d5955e6f7b4a0c4b56d21010ce8e812	Fixed in fd4e41545d5955e6f7b4a0c4b56d21010ce8e812
LinuxLinux	Affected ≥ 231c4110873a5db4975512c30aa10edcc5be56e2, < ee4b32220a6b41e71512e8804585325e685456ba	Fixed in ee4b32220a6b41e71512e8804585325e685456ba
LinuxLinux	Affected ≥ 231c4110873a5db4975512c30aa10edcc5be56e2, < 52faa05fcd9f78af99abebe30a4b7b444744c991	Fixed in 52faa05fcd9f78af99abebe30a4b7b444744c991
LinuxLinux	Affected =6.10	Fixed in–

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.

References

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