VulnerabilityPublished 22 Aug 2025Updated 5 Nov 2026

CVE-2025-38671: Linux kernel · i2c: qup: jump out of the loop in case of timeout

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d05ec13aa3eb868a60dc961b489053a643863ddc : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:34 UTC

Severity

Unrated

Rated by Threat Radar · 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 d05ec13aa3eb868a60dc961b489053a643863ddc, cbec4406998185e0311ae97dfacc649f9cd79b0b, c523bfba46c4b4d7676fb050909533a766698ecd +5

Exploitation evidence

Disclosed: evidence found.
CVE published 22 Aug 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 ≥ fbfab1ab065879370541caf0e514987368eb41b2, < d05ec13aa3eb868a60dc961b489053a643863ddc	Fixed in d05ec13aa3eb868a60dc961b489053a643863ddc
LinuxLinux	Affected ≥ fbfab1ab065879370541caf0e514987368eb41b2, < cbec4406998185e0311ae97dfacc649f9cd79b0b	Fixed in cbec4406998185e0311ae97dfacc649f9cd79b0b
LinuxLinux	Affected ≥ fbfab1ab065879370541caf0e514987368eb41b2, < c523bfba46c4b4d7676fb050909533a766698ecd	Fixed in c523bfba46c4b4d7676fb050909533a766698ecd
LinuxLinux	Affected ≥ fbfab1ab065879370541caf0e514987368eb41b2, < acfa2948be630ad857535cb36153697f3cbf9ca9	Fixed in acfa2948be630ad857535cb36153697f3cbf9ca9
LinuxLinux	Affected ≥ fbfab1ab065879370541caf0e514987368eb41b2, < a7982a14b3012527a9583d12525cd0dc9f8d8934	Fixed in a7982a14b3012527a9583d12525cd0dc9f8d8934
LinuxLinux	Affected ≥ fbfab1ab065879370541caf0e514987368eb41b2, < 89459f168b78e5c801dc8b7ad037b62898bc4f57	Fixed in 89459f168b78e5c801dc8b7ad037b62898bc4f57

Description

In the Linux kernel, the following vulnerability has been resolved: i2c: qup: jump out of the loop in case of timeout Original logic only sets the return value but doesn't jump out of the loop if the bus is kept active by a client. This is not expected. A malicious or buggy i2c client can hang the kernel in this case and should be avoided. This is observed during a long time test with a PCA953x GPIO extender. Fix it by changing the logic to not only sets the return value, but also jumps out of the loop and return to the caller with -ETIMEDOUT.

References

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