PT-2026-30183 · Linux · Linux Kernel

Published 2026-02-23 · Updated 2026-04-25 · CVE-2026-31400

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 flaw exists in the Linux kernel's sunrpc component related to a cache request leak within the cache release function. When a reader's file descriptor is closed during a cache request read operation, the request's reader count is decremented, but the request is not always freed. This can lead to a memory leak if the request is not properly cleaned up, particularly when the CACHE PENDING flag is clear. The issue arises because the cleanup logic present in cache read() is missing from cache release().

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

Memory Leak

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-401

CWE-772

Related Identifiers

BDU:2026-05764

CVE-2026-31400

ECHO-8C3A-FDC5-712D

OESA-2026-2075

OESA-2026-2077

Affected Products

Linux Kernel

References · 36

• https://cve.org/CVERecord?id=CVE-2026-31400 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2077 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23171 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31400 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31400 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31402 · Security Note
• https://ubuntu.com/security/CVE-2026-31400 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31400 · Vendor Advisory
• https://git.kernel.org/stable/c/be5c35960e5ead70862736161836e2d1bc7352dc · Patch
• https://git.kernel.org/stable/c/41f6ba6c98a618043d2cd71030bf9a752dfab8b2 · Patch
• https://git.kernel.org/stable/c/1dfedb293943e491379c9302b428e6f920a73d12 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31400 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23450 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31400 · Vendor Advisory
• https://git.kernel.org/stable/c/301670dcd098c1fe5c2fe90fb3c7a8f4814d2351 · Patch