PT-2026-35006 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-28 · CVE-2026-31654

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A memory leak exists in the mmap region() function. When /dev/zero is mapped with MAP SHARED, the mmap zero prepare() function calls shmem zero setup desc(), which allocates a new shmem file to back the mapping. If the mmap new vma() function subsequently fails, the replacement file is not released via fput(), leading to a memory leak.

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

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

CVE-2026-31654

Affected Products

Linux Kernel

References · 11

• https://security-tracker.debian.org/tracker/CVE-2026-31654 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31654 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31654 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31654 · Vendor Advisory
• https://git.kernel.org/stable/c/61fc8eaf2ab214b32c7bce52597c80cf0ca41ada · Patch
• https://ubuntu.com/security/CVE-2026-31654 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31654 · Security Note
• https://git.kernel.org/stable/c/894f99eb535edc4514f756818f3c4f688ba53a59 · Patch
• https://git.kernel.org/linus/894f99eb535edc4514f756818f3c4f688ba53a59 · Note
• https://twitter.com/CVEnew/status/2047731925293346981 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2047767182814175331 · Twitter Post