PT-2026-34922 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-09 · CVE-2026-31570

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/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 An out-of-bounds heap access exists in the cgw csum crc8 rel() function. Although the function calculates bounds-safe indices using calc idx(), it incorrectly uses raw signed 8-bit fields for the loop and result write. This allows reading and writing to memory locations before the start of the canfd frame on the heap when negative indices are provided. This issue was confirmed using KASAN on version 7.0-rc2.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-31570

ECHO-C8E1-F524-CF55

OESA-2026-2234

Affected Products

Linux Kernel

References · 27

• https://nvd.nist.gov/vuln/detail/CVE-2026-31602 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31590 · Security Note
• https://git.kernel.org/stable/c/999ca48d55a8a46da21519db7e834e5867200379 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31570 · Security Note
• https://git.kernel.org/stable/c/e7c99348b0612b2bc02d5ce6ff9873261cc7605f · Patch
• https://git.kernel.org/stable/c/c4e8eaa75fa0b6bcbfa5356d6195c4ad0e05e57a · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31570 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31570 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31570 · Vendor Advisory
• https://git.kernel.org/stable/c/66b689efd08227da2c5ca49b58b30a95d23c695a · Patch
• https://git.kernel.org/stable/c/b9c310d72783cc2f30d103eed83920a5a29c671a · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31680 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31450 · Security Note
• https://ubuntu.com/security/CVE-2026-31570 · Vendor Advisory
• https://git.kernel.org/stable/c/a025283d7f7404c739225e457fb99db2368bb544 · Patch