PT-2026-34983 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-28 · CVE-2026-31631

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

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

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

Description A buffer overread exists in the rxrpc component within the rxgk do verify authenticator() function. This occurs because the function fails to properly check the buffer size before verifying the nonce.

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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-31631

Affected Products

Linux Kernel

References · 12

• https://cve.org/CVERecord?id=CVE-2026-31631 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31631 · Vendor Advisory
• https://git.kernel.org/stable/c/f564af387c8c28238f8ebc13314c589d7ba8475d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31631 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31631 · Vendor Advisory
• https://git.kernel.org/stable/c/794586789800b16dcbe235452494f4223ac80413 · Patch
• https://ubuntu.com/security/CVE-2026-31631 · Vendor Advisory
• https://git.kernel.org/stable/c/1c4422d8be81718ecb15d79aedff607323085201 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31631 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2047808138577854713 · Twitter Post
• https://twitter.com/CVEnew/status/2047731956025053594 · Twitter Post
• https://git.kernel.org/linus/f564af387c8c28238f8ebc13314c589d7ba8475d · Note