CVE-2026-64256

kernel: xfs: don't wrap around quota ids in dqiterate

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 25, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's XFS filesystem. This vulnerability occurs in the dqiterate function, where an unsigned 32-bit quota identifier (q_id) can wrap around to zero if it reaches its maximum value. This integer overflow can cause the iteration of quota IDs to restart, potentially leading to a denial of service (DoS) by preventing proper processing of filesystem quotas.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-190 · Integer Overflow or Wraparound