Description
In the Linux kernel, the following vulnerability has been resolved:

cachefiles: Fix double unlock in nomem_d_alloc error path

When start_creating() fails and returns -ENOMEM, it has already
released the parent directory lock in __start_dirop():

static struct dentry *__start_dirop(...)
{
...
inode_lock_nested(dir, I_MUTEX_PARENT);
dentry = lookup_one_qstr_excl(name, parent, lookup_flags);
if (IS_ERR(dentry))
inode_unlock(dir); <-- Lock released on error
return dentry;
}

However, the nomem_d_alloc error path in cachefiles_get_directory()
unconditionally calls inode_unlock(d_inode(dir)) again, causing a
double unlock that corrupts the rwsem state.

This is a leftover from commit 7ab96df840e60 which replaced manual
locking with start_creating() but failed to update the nomem_d_alloc
path (while correctly updating mkdir_error and lookup_error paths).
Published: 2026-08-15
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Sat, 15 Aug 2026 11:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-362
CWE-404

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix double unlock in nomem_d_alloc error path When start_creating() fails and returns -ENOMEM, it has already released the parent directory lock in __start_dirop(): static struct dentry *__start_dirop(...) { ... inode_lock_nested(dir, I_MUTEX_PARENT); dentry = lookup_one_qstr_excl(name, parent, lookup_flags); if (IS_ERR(dentry)) inode_unlock(dir); <-- Lock released on error return dentry; } However, the nomem_d_alloc error path in cachefiles_get_directory() unconditionally calls inode_unlock(d_inode(dir)) again, causing a double unlock that corrupts the rwsem state. This is a leftover from commit 7ab96df840e60 which replaced manual locking with start_creating() but failed to update the nomem_d_alloc path (while correctly updating mkdir_error and lookup_error paths).
Title cachefiles: Fix double unlock in nomem_d_alloc error path
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:56:05.329Z

Reserved: 2026-08-09T03:40:39.922Z

Link: CVE-2026-72368

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:22:10.227

Modified: 2026-08-15T06:22:10.227

Link: CVE-2026-72368

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T10:45:06Z

Weaknesses