Description
In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_mapping() struct xfrm_usersa_id has a one-byte padding hole after the proto field, which ends up never getting set to zero before copying out to userspace. Fix that up by zeroing out the whole structure before setting individual variables.
Affected products
linux: linux kernel
References10
- git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 Patch
- git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2 Patch
- git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10 Patch
- git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24d Patch
- git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0c Patch
- git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9
- git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32
- git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f
- cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.com/productcert/html/ssa-457936.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: 3 · 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.