CVE-2025-38671
Published: August 25, 2025Last modified: August 25, 2025
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.151-r0) |
| 25 LTS | linux-lts | Fixed (6.12.41-r0) | |
| Stream | linux-lts | Fixed (6.12.41-r0) |
References
- 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
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html