PT-2026-34906 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-29 · CVE-2026-31554

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 Use-after-Free (UaF) issue exists in the Linux kernel when the sys futex requeue() function is used with different flags. This occurs because the system did not mandate identical flags for these operations.

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

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31554

Affected Products

Linux Kernel

References · 14

• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31554 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31554 · Security Note
• https://git.kernel.org/stable/c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5 · Patch
• https://ubuntu.com/security/CVE-2026-31554 · Vendor Advisory
• https://git.kernel.org/stable/c/e2f78c7ec1655fedd945366151ba54fcb9580508 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31554 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31554 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31554 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31554 · Vendor Advisory
• https://git.kernel.org/stable/c/19f94b39058681dec64a10ebeb6f23fe7fc3f77a · Patch
• https://git.kernel.org/stable/c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a · Patch
• https://docs.bell-sw.com/security/cves/CVE-2026-31554 · Note
• https://twitter.com/CVEnew/status/2047798631424827396 · Twitter Post
• https://git.kernel.org/linus/19f94b39058681dec64a10ebeb6f23fe7fc3f77a · Note