Riskcovery

CVE-2026-64386

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

State
Published
Severity
9.8 Critical
Published
Jul 25, 2026
Updated
Oct 19, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 433042a91f9373241307725b52de573933ffedbf to before 100fb7c455fa86d248b8bd7bb9de757c192870b4Affected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 3c81dda84799f76b42aec598564316e2964440dbAffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before f1add4acb656f5a82806a1ab0e63fed3d8b1bfcaAffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 89234773e8348918111aa15f6922b58cf3843364Affected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 2a88561d66eb855813cf004a0abe648bbb17de5eAffected
  • 6.6.32 to before 6.6.145Affected
LinuxLinux
  • 6.8Affected
  • before 6.8Not affected
  • 6.6.145 through 6.6.*Not affected
  • 6.12.96 through 6.12.*Not affected
  • 6.18.39 through 6.18.*Not affected
  • 7.1.4 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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