PT-2026-36090 · Linux · Linux Kernel

Published 2026-04-30 · Updated 2026-05-26 · CVE-2026-31693

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 In the CIFS (Common Internet File System) component, certain local variables were not properly reinitialized before a request was replayed. This occurred in several code locations where labels signify the start of the replay process, potentially leading to inconsistent states due to the use of uninitialized variables during the replay sequence.

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

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

CVE-2026-31693

Affected Products

Linux Kernel

References · 19

• https://ubuntu.com/security/CVE-2026-31693 · Vendor Advisory
• https://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ec · Patch
• https://git.kernel.org/stable/c/14f66f44646333d2bfd7ece36585874fd72f8286 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31693 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31693 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31693 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31693 · Vendor Advisory
• https://git.kernel.org/stable/c/c854ab481ece4b3e5f4c2e8b22824f015ff874a5 · Patch
• https://cve.org/CVERecord?id=CVE-2026-31693 · Security Note
• https://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aea · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31693 · Vendor Advisory
• https://git.kernel.org/stable/c/c99e160938b627f6f28edee930e8abc157e84386 · Patch
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31693 · Vendor Advisory
• https://git.kernel.org/linus/14f66f44646333d2bfd7ece36585874fd72f8286 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31693 · Note