VulnerabilityPublished 25 Jul 2025Updated 5 Nov 2026

CVE-2025-38436: Linux kernel · drm/scheduler: signal scheduled fence when kill job

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c5734f9bab6f0d40577ad0633af4090a5fda2407 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:20 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in c5734f9bab6f0d40577ad0633af4090a5fda2407, aefd0a935625165a6ca36d0258d2d053901555df, aa382a8b6ed483e9812d0e63b6d1bdcba0186f29 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 5 Nov 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a72ce6f84109c1dec1ab236d65979d3250668af3, < c5734f9bab6f0d40577ad0633af4090a5fda2407	Fixed in c5734f9bab6f0d40577ad0633af4090a5fda2407
LinuxLinux	Affected ≥ a72ce6f84109c1dec1ab236d65979d3250668af3, < aefd0a935625165a6ca36d0258d2d053901555df	Fixed in aefd0a935625165a6ca36d0258d2d053901555df
LinuxLinux	Affected ≥ a72ce6f84109c1dec1ab236d65979d3250668af3, < aa382a8b6ed483e9812d0e63b6d1bdcba0186f29	Fixed in aa382a8b6ed483e9812d0e63b6d1bdcba0186f29
LinuxLinux	Affected ≥ a72ce6f84109c1dec1ab236d65979d3250668af3, < 8342127a8a65b0673863b106ce32b79c91ae3270	Fixed in 8342127a8a65b0673863b106ce32b79c91ae3270
LinuxLinux	Affected ≥ a72ce6f84109c1dec1ab236d65979d3250668af3, < 471db2c2d4f80ee94225a1ef246e4f5011733e50	Fixed in 471db2c2d4f80ee94225a1ef246e4f5011733e50
LinuxLinux	Affected =4.3	Fixed in–

AI-suggested

This vulnerability has been fixed in specific Linux kernel commits. Users should update to a kernel version including these fixes to resolve the issue. No additional mitigation is required once the fix is applied.

Description

A vulnerability in the Linux kernel's DRM scheduler causes dependent applications to hang indefinitely when a job is killed without properly signaling its scheduled fence. This occurs because the scheduled fence from the killed job is not signaled, leaving dependent jobs waiting forever. The issue affects Linux kernel version 4.3 and has been fixed in later commits.

Impact

Dependent applications may hang indefinitely waiting on a scheduled fence that is never signaled when a related job is killed. This can cause application stalls or deadlocks in systems using the affected Linux kernel version.

Summary

The Linux kernel DRM scheduler had a flaw where killing an entity's job did not properly signal its scheduled fence. If another application's job depended on that fence, it would hang indefinitely waiting for a dependency that would never resolve. The fix ensures that scheduled fences are signaled when an entity is killed, preventing dependent jobs from hanging.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 5 Nov 2026, 21:20 UTC

Technical details

References

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