CVE-2026-64059

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix folio->private handling in netfs_perform_write() Under some circumstances, netfs_perform_write() doesn't correctly manipulate folio->private between NULL, NETFS_FOLIO_COPY_TO_CACHE, pointing to a group and pointing to a netfs_folio struct, leading to potential multiple attachments of private data with associated folio ref leaks and also leaks of netfs_folio structs or netfs_group refs. Fix this by consolidating the place at which a folio is marked uptodate in one place and having that look at what's attached to folio->private and decide how to clean it up and then set the new group. Also, the content shouldn't be flushed if group is NULL, even if a group is specified in the netfs_group parameter, as that would be the case for a new folio. A filesystem should always specify netfs_group or never specify netfs_group. The Sashiko auto-review tool noted that it was theoretically possible that the fpos >= ctx->zero_point section might leak if it modified a streaming write folio. This is unlikely, but with a network filesystem, third party changes can happen. It also pointed out that __netfs_set_group() would leak if called multiple times on the same folio from the "whole folio modify section".

• https://git.kernel.org/stable/c/0969ea8370bad0e4fb6131b6a7bed9e7ec522ac7Patch
• https://git.kernel.org/stable/c/551b5c71ee312ca7646ddb605231c1016e8cbb18Patch
• https://git.kernel.org/stable/c/7f040243c74d72b45b22246c7d9e621fbeab44acPatch
• https://git.kernel.org/stable/c/ccde2ac757c713535b224233a296de40efe5212dPatch

Published

Jul 19, 2026

Last Modified

Sep 2, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-64053In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64054In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64055In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-64056In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-64057In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64058In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-6406The Docker CLI --use-api-socket flag bypasses Enhanced Conta…8.8
• CVE-2026-64060In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-64061In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-64062In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-64063In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64064In the Linux kernel, the following vulnerability has been re…5.5