CVE-2026-64356

CVE CVE-2026-64356EUVD EUVD-2026-48900Published 2026-07-25T08:50:14.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 6.13; patch: 6.18.39; e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 <c3d3d2212c2966973dd7d603c6c6e6ed6fc7fbe1; e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 <45de375b25060edf46e20abb36521ba530336ceb; e80fbe1ad8eff7d7d1363e14f1e493d84dd37c84 <06a2e6dbaa26c0740ac76dfa66b0aedc78d05820; patch: 7.2-rc2; patch: 0; patch: 7.1.4

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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