CVE-2026-64385Doble liberación de memoria en el cliente SMB del kernel de Linux
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
Ver en NVDAnálisis
A critical double-free vulnerability in the Linux kernel SMB client (SMB2_ioctl) allows for potential memory corruption and system crashes. This affects Linux systems mounting remote SMB shares, posing a risk of remote code execution or privilege escalation.
Roles relevantes
Severidad
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HEPSS
Descripción técnica
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
Referencias
- 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