VulnerabilityPublished 24 Dec 2025Updated 21 Oct 2026

CVE-2025-68374: Linux kernel · md: fix rcu protection in md_wakeup_thread

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f98b191f78124405294481dea85f8a22a3eb0a59 : 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 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f98b191f78124405294481dea85f8a22a3eb0a59, dc6d1249ee35c1c76700b4b96281daeb7637bce1, a4bd1caf591faeae44cb10b6517e7dacb5139bda +2

Exploitation evidence

Disclosed: evidence found.
CVE published 24 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 4469315439827290923fce4f3f672599cabeb366, < f98b191f78124405294481dea85f8a22a3eb0a59	Fixed in f98b191f78124405294481dea85f8a22a3eb0a59
LinuxLinux	Affected ≥ 4469315439827290923fce4f3f672599cabeb366, < dc6d1249ee35c1c76700b4b96281daeb7637bce1	Fixed in dc6d1249ee35c1c76700b4b96281daeb7637bce1
LinuxLinux	Affected ≥ 4469315439827290923fce4f3f672599cabeb366, < a4bd1caf591faeae44cb10b6517e7dacb5139bda	Fixed in a4bd1caf591faeae44cb10b6517e7dacb5139bda
LinuxLinux	Affected ≥ 4469315439827290923fce4f3f672599cabeb366, < 21989cb5034c835b212385a2afadf279d8069da0	Fixed in 21989cb5034c835b212385a2afadf279d8069da0
LinuxLinux	Affected ≥ 4469315439827290923fce4f3f672599cabeb366, < 0dc76205549b4c25705e54345f211b9f66e018a0	Fixed in 0dc76205549b4c25705e54345f211b9f66e018a0
LinuxLinux	Affected =6.5	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: md: fix rcu protection in md_wakeup_thread We attempted to use RCU to protect the pointer 'thread', but directly passed the value when calling md_wakeup_thread(). This means that the RCU pointer has been acquired before rcu_read_lock(), which renders rcu_read_lock() ineffective and could lead to a use-after-free.

References

Community reviews

Loading reviews…