PT-2026-34908 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-29 · CVE-2026-31556

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 An issue exists in the xfs scrub component where the xchk quota item() function can return early after calling xchk fblock process error(). If the helper returns false, the function exits without releasing the dq->q qlock lock. This can lead to lock leaks or deadlocks during subsequent quota operations.

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

Related Identifiers

CVE-2026-31556

Affected Products

Linux Kernel

References · 14

• https://git.kernel.org/stable/c/268378b6ad20569af0d1957992de1c8b16c6e900 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31556 · Vendor Advisory
• https://git.kernel.org/stable/c/e822f535273af0e8968eab7acc0cea0b90dd25af · Patch
• https://git.kernel.org/stable/c/3b0c3414b308e6822cda90bf99f7eac94d4cca2b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31556 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31556 · Vendor Advisory
• https://git.kernel.org/stable/c/d128fc0c5c2b19224927d4fd2a46c2fe6a1f606f · Patch
• https://ubuntu.com/security/CVE-2026-31556 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31556 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31556 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31556 · Security Note
• https://twitter.com/CVEnew/status/2047798629575033108 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-31556 · Note
• https://git.kernel.org/linus/268378b6ad20569af0d1957992de1c8b16c6e900 · Note