PT-2026-36333 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-16 · CVE-2026-31703

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 issue exists in the inode switch wbs work fn() function. The function utilizes a loop to process items from the switch wbs ctxs list of the new wb object. Because of this looping mechanism, it is possible for wb->switch work to remain pending while the wb->switch wbs ctxs list is empty. In such scenarios, the wb object can be freed due to a lack of references from items in the list, leading to a use-after-free condition when the pending work eventually executes.

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-2026-31703

OPENSUSE-SU-2026:10793-1

Affected Products

Linux Kernel

References · 46

• https://osv.dev/vulnerability/openSUSE-SU-2026:10793-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31703 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31703 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31703 · Vendor Advisory
• https://git.kernel.org/stable/c/6689f01d6740cf358932b3e97ee968c6099800d9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31703 · Security Note
• https://git.kernel.org/stable/c/028103656b84273c73e9e271cf95c9f3421f4b8a · Patch
• https://git.kernel.org/stable/c/9223e5f30403a9b506d6d0bff4f2e29a2d7d46af · Patch
• https://cve.org/CVERecord?id=CVE-2026-31703 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31703 · Vendor Advisory
• https://suse.com/security/cve/CVE-2026-31717 · Note
• https://suse.com/security/cve/CVE-2026-31718 · Note
• https://suse.com/security/cve/CVE-2026-31712 · Note
• https://suse.com/security/cve/CVE-2026-43350 · Note
• https://suse.com/security/cve/CVE-2026-43071 · Note