Security Advisory
CVE-2026-64385
9.8
CRITICAL
Vulnerability Description
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.
Published Date
July 25, 2026
Official Source
NIST NVD Advisory