CVE-2025-38671: debian linux — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.17 — 5.4.297
linux	linux_kernel	5.5 — 5.10.241
linux	linux_kernel	5.11 — 5.15.190
linux	linux_kernel	5.16 — 6.1.148
linux	linux_kernel	6.2 — 6.6.101
linux	linux_kernel	6.7 — 6.12.41
linux	linux_kernel	6.13 — 6.15.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/0d33913fce67a93c1eb83396c3c9d6b411dcab33 https://git.kernel.org/stable/c/42c4471b30fa203249f476dd42321cd7efb7f6a8 https://git.kernel.org/stable/c/89459f168b78e5c801dc8b7ad037b62898bc4f57 https://git.kernel.org/stable/c/a7982a14b3012527a9583d12525cd0dc9f8d8934 https://git.kernel.org/stable/c/acfa2948be630ad857535cb36153697f3cbf9ca9 https://git.kernel.org/stable/c/c523bfba46c4b4d7676fb050909533a766698ecd https://git.kernel.org/stable/c/cbec4406998185e0311ae97dfacc649f9cd79b0b https://git.kernel.org/stable/c/d05ec13aa3eb868a60dc961b489053a643863ddc

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is CVE-2025-38671? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38671? +

CVE-2025-38671 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-38671? +

CVE-2025-38671 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-38671? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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