CVE-2026-64040: cachefiles: Fix error return when vfs_mkdir() fails
In the Linux kernel, the following vulnerability has been resolved:
cachefiles: Fix error return when vfsmkdir() fails
When vfsmkdir() fails, the error code is not extracted from the returned error pointer. This causes mkdirerror to be reached with ret=0, which leads to returning ERRPTR(0) (NULL) instead of a proper error pointer.
Fix this by extracting the error code from the error pointer when vfsmkdir() fails.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64040?
CVE-2026-64040 has a risk rating of 12.
How do I fix CVE-2026-64040?
To fix CVE-2026-64040, ensure you apply the latest Linux kernel update that addresses this vulnerability.
What systems are affected by CVE-2026-64040?
CVE-2026-64040 affects the Linux kernel specifically related to the cachefiles functionality.
What is the impact of CVE-2026-64040?
The impact of CVE-2026-64040 could lead to improper error handling in directory creation, potentially causing system instability.
When was CVE-2026-64040 published?
CVE-2026-64040 was published on July 19, 2026.