Double free in Linux kernel - CVE-2026-64385
Published: July 27, 2026
Vulnerability identifier: #VU139589
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64385
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to double free in SMB2_ioctl() when handling replayable ioctl responses. A remote user can trigger a replayable error condition to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-64385
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6
- https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3b
- https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6
- https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9
- https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72