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VULNERABILITIES

CVE-2026-31671 Details

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.

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://cert-portal.siemens.com/productcert/html/ssa-082556.html siemens-SADP
https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9 kernel.orgPatch
https://git.kernel.org/stable/c/0a30dceb0e1f0c480d2482e6d7cebf8aebb6eb72 kernel.orgPatch
https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe kernel.orgPatch

see all 10 references

Weakness Enumeration

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

Affected Products

ProductVersions
linux linux kernel
>= 2.6.19.1, < 5.10.253
>= 5.11, < 5.15.203
>= 5.16, < 6.1.169
>= 6.2, < 6.6.135
>= 6.7, < 6.12.82

CPE

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.19:-:*:*:*:*:*:*
  • 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

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-31671
NVD Published Date:
Apr 24, 2026
NVD Last Modified:
Jul 14, 2026
Source:
kernel.org
CVE-2026-31671 Details - Not Deferred