CVE-2026-64356

0.0

xfs: fix memory leak in xfs_dqinode_metadir_create()

Overview
Vulnerability Timeline

Overview

Description

In the Linux kernel, the following vulnerability has been resolved: xfs: fix memory leak in xfs_dqinode_metadir_create() If xfs_metadir_create() fails in xfs_dqinode_metadir_create(), the current code returns directly, leaking the allocated update and transaction state. If the subsequent commit fails, the caller-owned inode reference is left behind. Fix this memory leak by routing the create failure path through xfs_metadir_cancel(). For both create and commit failures, finish and release any inode returned to the caller, mirroring the unwind pattern in xfs_metadir_mkdir(). The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. Runtime validation used kprobe fault injection during `mount -o uquota` on a metadir XFS image. Injecting xfs_metadir_create() reproduced the old active-update path that left mount stuck later in mount setup; after this change, the same injection reported cancel_hits=1 and irele_hits=1. Injecting xfs_metadir_commit() exercised the old inode-reference leak path; after this change, it reported irele_hits=1.

Details

INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Impact

Affected Products

The following products are affected by CVE-2026-64356 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Linux	linux_kernel

: Total Affected Vendor : 1 | Products : 1

Solution

Fix memory leak in xfs_dqinode_metadir_create by routing failures through xfs_metadir_cancel.

Apply the kernel patch to xfs_dqinode_metadir_create.
Ensure failures are routed through xfs_metadir_cancel.
Release any inode returned to the caller.
Commit any necessary transaction state.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64356.

URL	Resource
https://git.kernel.org/stable/c/06a2e6dbaa26c0740ac76dfa66b0aedc78d05820
https://git.kernel.org/stable/c/45de375b25060edf46e20abb36521ba530336ceb
https://git.kernel.org/stable/c/c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64356 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64356 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64356 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64356 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Aug. 17, 2026

Action	Type	Old Value	New Value
Changed	Affected	[{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': 'c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '06a2e6dbaa26c0740ac76dfa66b0aedc78d05820', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '45de375b25060edf46e20abb36521ba530336ceb', 'versionType': 'git'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'affected'}]	[{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': 'c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '06a2e6dbaa26c0740ac76dfa66b0aedc78d05820', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '45de375b25060edf46e20abb36521ba530336ceb', 'versionType': 'git'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'affected'}]

New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Jul. 25, 2026

Action	Type	New Value
Added	Affected	[{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': 'c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '06a2e6dbaa26c0740ac76dfa66b0aedc78d05820', 'versionType': 'git'}, {'status': 'affected', 'version': 'e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84', 'lessThan': '45de375b25060edf46e20abb36521ba530336ceb', 'versionType': 'git'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/xfs/libxfs/xfs_dquot_buf.c'], 'defaultStatus': 'affected'}]
Added	Description	In the Linux kernel, the following vulnerability has been resolved: xfs: fix memory leak in xfs_dqinode_metadir_create() If xfs_metadir_create() fails in xfs_dqinode_metadir_create(), the current code returns directly, leaking the allocated update and transaction state. If the subsequent commit fails, the caller-owned inode reference is left behind. Fix this memory leak by routing the create failure path through xfs_metadir_cancel(). For both create and commit failures, finish and release any inode returned to the caller, mirroring the unwind pattern in xfs_metadir_mkdir(). The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. Runtime validation used kprobe fault injection during `mount -o uquota` on a metadir XFS image. Injecting xfs_metadir_create() reproduced the old active-update path that left mount stuck later in mount setup; after this change, the same injection reported cancel_hits=1 and irele_hits=1. Injecting xfs_metadir_commit() exercised the old inode-reference leak path; after this change, it reported irele_hits=1.
Added	Reference	https://git.kernel.org/stable/c/06a2e6dbaa26c0740ac76dfa66b0aedc78d05820
Added	Reference	https://git.kernel.org/stable/c/45de375b25060edf46e20abb36521ba530336ceb
Added	Reference	https://git.kernel.org/stable/c/c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.

Memory Corruption

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