CVE-2026-80534
Received Received - Intake

XFS Quota Inode ILOCK Leak in Linux Kernel

Publication date: 2026-08-26

Last updated on: 2026-08-26

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: xfs: fix ilock leak on error in xfs_dq_get_next_id xfs_dq_get_next_id() takes the quota inode ILOCK before calling xfs_iread_extents(). If xfs_iread_extents() fails, the function returns immediately without releasing the lock, leaking the quota inode ILOCK. This can leave the quota inode locked and cause subsequent quota operations to hang. Fix this by jumping to a common unlock path on error instead of returning directly.

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Meta Information

Published
2026-08-26
Last Modified
2026-08-26
Generated
2026-08-26
AI Q&A
2026-08-26
EPSS Evaluated
N/A
NVD
CVE-2026-80534
EUVD
EUVD-2026-66449

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux_kernel xfs *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a Linux kernel vulnerability where a function called xfs_dq_get_next_id() fails to release a lock on a quota inode when an error occurs. The function locks the quota inode before reading extents, but if reading fails, it returns without unlocking, causing the lock to leak. This can lead to subsequent quota operations hanging.

Detection Guidance

This vulnerability is specific to the Linux kernel's XFS filesystem and involves a lock leak in quota inode handling. Detection requires checking for hung quota operations or kernel logs indicating ILOCK leaks. Monitor for processes stuck in 'D' state or XFS-related errors in dmesg or journalctl logs.

Impact Analysis

If you use a system running the affected Linux kernel with XFS filesystem and quota features, this vulnerability could cause quota operations to hang. This may lead to system unresponsiveness or crashes, affecting file system operations and overall system stability.

Mitigation Strategies

Apply the latest kernel update from your distribution to patch the XFS quota inode lock leak. If immediate patching is not possible, avoid triggering quota operations until patched. Monitor system logs for quota-related hangs or errors as a sign of exploitation.

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