CVE-2026-80534
Description
A flaw was found in the XFS filesystem component of the Linux kernel. The xfs_dq_get_next_id() function fails to release an inode lock (ilock) if an error occurs during extent reading. This ilock leak can leave the quota inode permanently locked, preventing further quota operations and leading to a denial of service for affected systems.
Statement
This flaw has a LOW impact. In the Linux kernel XFS filesystem, xfs_dq_get_next_id() can leak the quota inode's ILOCK on an error path: if xfs_iread_extents() fails, the function returns without releasing the inode lock, leaving the quota inode locked and causing subsequent XFS quota operations to hang. A local user able to reach the XFS quota control path (e.g. Q_XGETNEXTQUOTA) on a mounted XFS filesystem with quotas enabled could, when the extent-loading error condition occurs, cause a denial of service limited to XFS quota management. The issue is not network reachable and has no confidentiality, integrity, memory-corruption, or privilege-escalation impact.
Mitigation
This issue only affects systems using XFS filesystems with quota support enabled and is limited to XFS quota management operations. No mitigation other than applying the kernel update meets Red Hat Product Security's criteria for ease of use, broad applicability, and stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.7 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU)
Inconsistent locking discipline can lead to deadlock.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
