CVE-2026-64397

In the Linux kernel, the following vulnerability has been resolved: ksmbd: serialize QUERY_DIRECTORY requests per file smb2_query_dir() stores a pointer to its stack-allocated private data in the ksmbd_file readdir_data. Concurrent QUERY_DIRECTORY requests using the same file handle can overwrite this pointer while an iterate_dir() callback is still using it, resulting in a stack use-after-free. Add a per-file mutex and hold it while accessing the shared directory enumeration state. The lock covers scan restart, dot entry state, readdir_data setup and iteration, and response construction. This prevents another request from replacing readdir_data.private before the current request has finished using it and also serializes the shared file position.

• CWE-416

• https://git.kernel.org/stable/c/1426fd79102539bc0ab5c8fced047ad4313b9908Patch
• https://git.kernel.org/stable/c/2a64dbf9c739ddf7a25a066507597bf89f8f73d2Patch
• https://git.kernel.org/stable/c/64dac2d486ec1eb18dc00968b16a230b6b75ec24Patch
• https://git.kernel.org/stable/c/a1d5d31cad593ea5e1b637f2f39c9ef6d09d1199Patch
• https://git.kernel.org/stable/c/be6d26bf27499977c746abc163659915082348d8Patch
• https://git.kernel.org/stable/c/fd22b039a5a05bc1d6818e9dcd1001fb432a829dPatch

Published

Jul 25, 2026

Last Modified

Sep 4, 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-2026-64391In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-64392In the Linux kernel, the following vulnerability has been re…9.1
• CVE-2026-64393In the Linux kernel, the following vulnerability has been re…9.1
• CVE-2026-64394In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-64395In the Linux kernel, the following vulnerability has been re…7.5
• CVE-2026-64396In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-64398In the Linux kernel, the following vulnerability has been re…8.1
• CVE-2026-64399In the Linux kernel, the following vulnerability has been re…9.8
• CVE-2026-6440The GoodMeet – Google Meet Integration for Webinar, Meeting …4.3
• CVE-2026-64400In the Linux kernel, the following vulnerability has been re…8.6
• CVE-2026-64401In the Linux kernel, the following vulnerability has been re…7.8
• CVE-2026-64402In the Linux kernel, the following vulnerability has been re…7.8