PT-2026-34345 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-05-07 · CVE-2026-31440

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 occurs in the dmaengine idxd component during the device removal process. When a device is reset, configuration registers return to their default state of zero. The driver fails to deallocate event log memory because it checks if event log support was enabled before performing the deallocation, a check that fails after a reset. The issue is related to the validation of the idxd->evl variable.

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-2026-31440

Affected Products

Linux Kernel

References · 17

• https://git.kernel.org/stable/c/9dfa00967e6ef43a9dd0887fe5c3a721a39da92e · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31440 · Security Note
• https://ubuntu.com/security/CVE-2026-31440 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31440 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31440 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31440 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31440 · Vendor Advisory
• https://git.kernel.org/stable/c/facd0012708e942fc12890708738aebde497564e · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31440 · Vendor Advisory
• https://git.kernel.org/stable/c/ee66bc29578391c9b48523dc9119af67bd5c7c0f · Patch
• https://git.kernel.org/stable/c/d94f9b0ba28a205caf95902ee88b42bdb8af83d0 · Patch
• https://twitter.com/CVEnew/status/2046980053439762736 · Twitter Post
• https://t.me/cveNotify/162620 · Telegram Post
• https://git.kernel.org/stable/c/695b491dc3f20365fd5821f22e25dbe3c1c20cbc · Note
• https://git.kernel.org/linus/ee66bc29578391c9b48523dc9119af67bd5c7c0f · Note