PT-2026-35023 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-06-15 · CVE-2026-31671

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An information leak exists in the build report() function within xfrm user. The struct xfrm user report contains a u8 proto field followed by a struct xfrm selector, resulting in three bytes of padding. This padding is not zeroed before being copied to userspace, potentially exposing sensitive data.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-31671

ECHO-A41A-3A43-3577

SUSE-SU-2026:22099-1

SUSE-SU-2026:22108-1

SUSE-SU-2026:22112-1

SUSE-SU-2026:22127-1

Affected Products

Linux Kernel

References · 278

• https://osv.dev/vulnerability/SUSE-SU-2026:22108-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22127-1 · Vendor Advisory
• https://git.kernel.org/stable/c/ff5ee507302303b15859753c3e0d67d38fd12c88 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31671 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31671 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31671 · Security Note
• https://git.kernel.org/stable/c/d10119968d0e1f2b669604baf2a8b5fdb72fa6b4 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31671 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22099-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22112-1 · Vendor Advisory
• https://git.kernel.org/stable/c/6c55714c931051cd7f4839c19ce0867179fd22fe · Patch
• https://cve.org/CVERecord?id=CVE-2026-31671 · Security Note
• https://git.kernel.org/stable/c/716c546e88cfe49d841658240e10cb57bc50a2cc · Patch
• https://git.kernel.org/stable/c/0616314b3b34f24cbb91da8c6bd8bcdc4c8592f9 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31671 · Vendor Advisory