PT-2026-34950 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-06 · CVE-2026-31598

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/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 deadlock can occur in the ocfs2 module due to an ABBA lock ordering violation between the ocfs2 unlink() and ocfs2 dio end io write() functions. The ocfs2 unlink() function acquires the orphan directory inode lock followed by ip alloc sem, whereas ocfs2 dio end io write() acquires these locks in the reverse order. This conflict happens between the lock classes ocfs2 sysfile lock key[ORPHAN DIR SYSTEM INODE] and ocfs2 file ip alloc sem key.

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

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-31598

ECHO-3173-1714-D5BD

OPENSUSE-SU-2026:10703-1

Affected Products

Linux Kernel

References · 78

• https://git.kernel.org/stable/c/2b884d52273c60c298bd570163e8053657bbaff6 · Patch
• https://git.kernel.org/stable/c/e049f7a9bd80b7319590789ea5e1c523d6339d91 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31598 · Security Note
• https://git.kernel.org/stable/c/f9fb1a7b635849322e1d7b7b6b26389778ec8e82 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31598 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31598 · Vendor Advisory
• https://git.kernel.org/stable/c/b02da26a992db0c0e2559acbda0fc48d4a2fd337 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31598 · Vendor Advisory
• https://git.kernel.org/stable/c/bc0fb5c7d54c78be43a536df0e20dee32adb27d3 · Patch
• https://git.kernel.org/stable/c/4b80b5a838a32437f2cae0662578bac216a2c51a · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31598 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10703-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31598 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31598 · Security Note
• https://suse.com/security/cve/CVE-2026-31621 · Note