CVE-2025-39942 Affecting linux-6.1 package, versions <6.1.158-1~deb11u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN11-LINUX61-14114897
- published26 Nov 2025
- disclosed4 Oct 2025
Introduced: 4 Oct 2025
CVE-2025-39942 (opens in a new tab)How to fix?
Upgrade Debian:11 linux-6.1 to version 6.1.158-1~deb11u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.1 package and not the linux-6.1 package as distributed by Debian.
See How to fix? for Debian:11 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: smbdirect: verify remaining_data_length respects max_fragmented_recv_size
This is inspired by the check for data_offset + data_length.
References
- https://security-tracker.debian.org/tracker/CVE-2025-39942
- https://git.kernel.org/stable/c/196a3a7676d726ee67621ea2bf3b7815ac2685b4
- https://git.kernel.org/stable/c/9644798294c7287e65a7b26e35aa6d2ce3345bcc
- https://git.kernel.org/stable/c/c64b915bb3d9339adcae5db4be2c35ffbef5e615
- https://git.kernel.org/stable/c/d3cb3f209d35c44b7ee74f77ed27ebb28995b9ce
- https://git.kernel.org/stable/c/e1868ba37fd27c6a68e31565402b154beaa65df0