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VULNERABILITIES

CVE-2026-43089 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-019113.html siemens-SADP
https://git.kernel.org/stable/c/1beb76b2053b68c491b78370794b8ff63c8f8c02 kernel.orgPatch
https://git.kernel.org/stable/c/521385cbd50ca9474396d88462fcdfa6489685d9 kernel.org
https://git.kernel.org/stable/c/5a1a4b049ddde41466ccac0daeec326254b133f2 kernel.orgPatch
https://git.kernel.org/stable/c/700c9622b23c33b5933e6dcea816492c064e4e10 kernel.orgPatch

see all 9 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-401Missing Release of Memory after Effective Lifetime[email protected]

Affected Products

ProductVersions
linux linux kernel
>= 2.6.29.1, < 6.6.136
>= 6.7, < 6.12.83
>= 6.13, < 6.18.24
>= 6.19, < 6.19.14
7.0 rc1

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-43089
NVD Published Date:
May 6, 2026
NVD Last Modified:
Sep 8, 2026
Source:
kernel.org
CVE-2026-43089 Details - Not Deferred