PT-2026-32152 · Linux · Linux Kernel

Published 2026-04-12 · Updated 2026-05-20 · CVE-2026-31413

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 The Linux kernel contains a flaw in the BPF verifier related to unsound scalar forking in the maybe fork scalars() function when handling BPF OR operations. Specifically, the function incorrectly forks the verifier state, leading to a divergence between the verifier and runtime values. This divergence can result in out-of-bounds map access.

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

Out of bounds Read

Stack Overflow

Weakness Enumeration

CWE-125

CWE-121

Related Identifiers

BDU:2026-05267

CVE-2026-31413

Affected Products

Linux Kernel

References · 24

• https://git.kernel.org/stable/c/c845894ebd6fb43226b3118d6b017942550910c5 · Patch
• https://bdu.fstec.ru/vul/2026-05267 · Security Note
• https://git.kernel.org/stable/c/d13281ae7ea8902b21d99d10a2c8caf0bdec0455 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31413 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31413 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31413 · Vendor Advisory
• https://git.kernel.org/stable/c/58bd87d0e69204dbd739e4387a1edb0c4b1644e7 · Patch
• https://linux.oracle.com/errata/ELSA-2026-50260.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31413 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31413 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31413 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31413 · Security Note
• https://git.kernel.org/stable/c/342aa1ee995ef5bbf876096dc3a5e51218d76fa4 · Patch
• https://github.com/Rat5ak/bpf-research · Note
• https://lore.kernel.org/linux-cve-announce/2026041220-CVE-2026-31413-cce6@gregkh · Note