CVE-2026-64382 PUBLISHED

smb: client: fix double-free in SMB2_open() replay

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 double-free in SMB2_open() replay

A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_open_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 02bc2896bdc3e29362d6e40d404006944a159c25 (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 3196b5192f246df4272072f61a2f4a3e9967f55d (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to 14498ff5ce0f272ce0ef988721413e06b7038972 (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to ff2d30927bc3bf3c629f0768d2068096e64ef5ce (excl.)
  • affected from 4f1fffa2376922f3d1d506e49c0fd445b023a28e to b55e182f2324bc6a604c21a47aa6c448f719a532 (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