CVE-2026-43089
MEDIUM severity · CVSS 5.5 · CWE-401
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02Patch
- https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2Patch
- https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10Patch
- https://git.kernel.org/stable/c/d3125c541a96fb3c0fc7210112684baf22b6c24dPatch
- https://git.kernel.org/stable/c/f779a6b6cdb6e12baa0663063ac59ab2a8f20c0cPatch
- https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9
- https://git.kernel.org/stable/c/72a8de41c3eb4dcf22bf3b674ea38fb2f75d6f32
- https://git.kernel.org/stable/c/c2779ae9a3e5a044e5ccd564681511bbbcc5fc0f