CVE-2026-64040
In the Linux kernel, the following vulnerability has been resolved: cachefiles: Fix error return when vfs_mkdir() fails When vfs_mkdir() fails, the error code is not extracted from the returned error pointer. This causes mkdir_error to be reached with ret=0, which leads to returning ERR_PTR(0) (NULL) instead of a proper error pointer. Fix this by extracting the error code from the error pointer when vfs_mkdir() fails.
Affected versions
Linux kernel versions
6.15
and later are affected. Fixed in
7.0.11,
7.1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-64040?
CVE-2026-64040 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.15 onward and has been patched in 7.0.11 and 7.1. CVE-2026-64040 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64040?
Yes — CVE-2026-64040 has been patched. Fixed versions include 7.0.11 and 7.1. If you are running Linux kernel 6.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64040 actively exploited?
No — CVE-2026-64040 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.