CVE-2026-64387

Summary

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix query directory replay double-free

A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux433042a91f9373241307725b52de573933ffedbf < 3409aedf3c81a810243da94164f6621c9d205c98affected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < 1665f25b1dea30bf2d02e16245d203a944c9d994affected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < 00b0fa425941438b664950a8ee65dfba2def4336affected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < 3317a5d015fca976475aa71df224056777316fdeaffected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < 9647492b5e41954be59d5157eddbcd4cdc1656f7affected
LinuxLinux6.6.32 < 6.6.145affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References