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CVE-2026-64386

smb: client: fix query_info() replay double-free

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.6.145, 6.12.96, 6.18.39, 7.1.4
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 433042a91f9373241307725b52de573933ffedbf · fixed in 100fb7c455fa86d248b8bd7bb9de757c192870b4; From 4f1fffa2376922f3d1d506e49c0fd445b023a28e · fixed in 3c81dda84799f76b42aec598564316e2964440db; From 4f1fffa2376922f3d1d506e49c0fd445b023a28e · fixed in f1add4acb656f5a82806a1ab0e63fed3d8b1bfca; From 4f1fffa2376922f3d1d506e49c0fd445b023a28e · fixed in 89234773e8348918111aa15f6922b58cf3843364; From 4f1fffa2376922f3d1d506e49c0fd445b023a28e · fixed in 2a88561d66eb855813cf004a0abe648bbb17de5e; From 6.6.32 · fixed in 6.6.145

  • Linux Linux

    6.8

  • KernelLinux

    fixed in 6.6.145; From 6.7.0 · fixed in 6.12.96; From 6.8.0 · fixed in 6.18.39; From 6.13.0 · fixed in 7.1.4

References 5

git.kernel.org