Description
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9 Patch
- git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72 Patch
- git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe Patch
- git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc Patch
- git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4 Patch
- git.kernel.org/stable/c/d27c02eec529f78055a46a5c9e6c62684382b2d8 Patch
- git.kernel.org/stable/c/e0c8542c3d097ed4205ded51868195d5d6ddac62 Patch
- git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88 Patch
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-082556.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
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-401
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.