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CVE-2026-64217

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfil…

Published Jul 24, 2026CWE-787EPSS 0.13%

Overview

CVE-2026-64217 is a high-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

netfs: Fix overrun check in netfs_extract_user_iter()

Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills

pages[], then those pages don't get included in the iterator constructed at

the end of the function. If there was an overfill, memory corruption has

already happened.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/00efe58bbdcc93272d579ca24bfc912563f4a204Refgit.kernel.org/stable/c/0ef37eef83fad3542ee06db2940433ae1a92b39dRefgit.kernel.org/stable/c/96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9Refgit.kernel.org/stable/c/afeb32d9bf9aaeea51d0f723a19f14afb73bd94dRefgit.kernel.org/stable/c/f48b9157f0f611fa436c360648603d5ded719b12

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64217?

CVE-2026-64217 is a high-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-64217?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-64217?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64217?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64217 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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