Description
In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent a potential integer overflow If the tag length is >= U32_MAX - 3 then the "length + 4" addition can result in an integer overflow. Address this by splitting the decoding into several steps so that decode_cb_compound4res() does not have to perform arithmetic on the unsafe length value.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/084f797dbc7e52209a4ab6dbc7f0109268754eb9 Patch
- git.kernel.org/stable/c/3c5f545c9a1f8a1869246f6f3ae8c17289d6a841 Patch
- git.kernel.org/stable/c/745f7ce5a95e783ba62fe774325829466aec2aa8 Patch
- git.kernel.org/stable/c/7f33b92e5b18e904a481e6e208486da43e4dc841 Patch
- git.kernel.org/stable/c/842f1c27a1aef5367e535f9e85c8c3b06352151a Patch
- git.kernel.org/stable/c/90adbae9dd158da8331d9fdd32077bd1af04f553 Patch
- git.kernel.org/stable/c/ccd3394f9a7200d6b088553bf38e688620cd27af Patch
- git.kernel.org/stable/c/dde654cad08fdaac370febb161ec41eb58e9d2a2 Patch
- git.kernel.org/stable/c/de53c5305184ca1333b87e695d329d1502d694ce Patch
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 46 · as of 6 November 2026
- CWE
- CWE-190
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.