PT-2026-34376 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-05-06 · CVE-2026-31471

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A flaw exists in the xfrm iptfs component where the iptfs clone state() function stores x->mode data before the reorder window is allocated. If this allocation fails, the system frees the cloned state and returns an error, but x->mode data continues to point to the freed memory. Subsequently, the xfrm clone unwind process calls destroy state() using the invalid x->mode data pointer, leading to a double-free scenario where the IPTFS state is torn down again.

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

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2026-31471

Affected Products

Linux Kernel

References · 12

• https://ubuntu.com/security/CVE-2026-31471 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31471 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31471 · Vendor Advisory
• https://git.kernel.org/stable/c/371a43c4ac70cac0de9f9b1fc5b1660b9565b9f1 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31471 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31471 · Security Note
• https://git.kernel.org/stable/c/d849a2f7309fc0616e79d13b008b0a47e0458b6e · Patch
• https://git.kernel.org/stable/c/5784a1e2889c9525a8f036cb586930e232170bf7 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31471 · Vendor Advisory
• https://git.kernel.org/linus/d849a2f7309fc0616e79d13b008b0a47e0458b6e · Note
• https://t.me/cveNotify/162444 · Telegram Post
• https://twitter.com/CVEnew/status/2046980014000767154 · Twitter Post