VulnerabilityPublished 8 May 2026Updated 5 Nov 2026

CVE-2025-71296: Linux kernel · drm/tests: shmem: Hold reservation lock around purge

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in cdf8bbbd9017adcfb91ad9a902198d4b507719a9 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

EPSS

0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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 cdf8bbbd9017adcfb91ad9a902198d4b507719a9, 8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f, 3f41307d589c2f25d556d47b165df808124cd0c4

Exploitation evidence

Disclosed: evidence found.
CVE published 8 May 2026
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 Linux kernel to cdf8bbbd9017adcfb91ad9a902198d4b507719a9, 8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f or 3f41307d589c2f25d556d47b165df808124cd0c4.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 954907f7147dc43e0d1cd4d430c21d143d5fdf55, < cdf8bbbd9017adcfb91ad9a902198d4b507719a9	Fixed in cdf8bbbd9017adcfb91ad9a902198d4b507719a9
LinuxLinux	Affected ≥ 954907f7147dc43e0d1cd4d430c21d143d5fdf55, < 8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f	Fixed in 8baeee2c1c0cdb3a8eac3b8f38156cce6ee1a69f
LinuxLinux	Affected ≥ 954907f7147dc43e0d1cd4d430c21d143d5fdf55, < 3f41307d589c2f25d556d47b165df808124cd0c4	Fixed in 3f41307d589c2f25d556d47b165df808124cd0c4
LinuxLinux	Affected =6.16	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: drm/tests: shmem: Hold reservation lock around purge Acquire and release the GEM object's reservation lock around calls to the object's purge operation. The tests use drm_gem_shmem_purge_locked(), which led to errors such as show below. [ 58.709128] WARNING: CPU: 1 PID: 1354 at drivers/gpu/drm/drm_gem_shmem_helper.c:515 drm_gem_shmem_purge_locked+0x51c/0x740 Only export the new helper drm_gem_shmem_purge() for Kunit tests. This is not an interface for regular drivers.

References

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