CVE-2026-64387 PUBLISHED

smb: client: fix query directory replay double-free

Assigner: Linux
Reserved: 19.07.2026 Published: 25.07.2026 Updated: 25.07.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 433042a91f9373241307725b52de573933ffedbf to 3409aedf3c81a810243da94164f6621c9d205c98 (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 1665f25b1dea30bf2d02e16245d203a944c9d994 (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 00b0fa425941438b664950a8ee65dfba2def4336 (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 3317a5d015fca976475aa71df224056777316fde (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 9647492b5e41954be59d5157eddbcd4cdc1656f7 (excl.)
  • affected from 6.6.32 to 6.6.145 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.8 is affected
  • unaffected from 0 to 6.8 (excl.)
  • unaffected from 6.6.145 to 6.6.* (incl.)
  • unaffected from 6.12.96 to 6.12.* (incl.)
  • unaffected from 6.18.39 to 6.18.* (incl.)
  • unaffected from 7.1.4 to 7.1.* (incl.)
  • unaffected from 7.2-rc1 to * (incl.)

References