Riskcovery

CVE-2026-64387

smb: client: fix query directory 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 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.

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 3409aedf3c81a810243da94164f6621c9d205c98Affected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 1665f25b1dea30bf2d02e16245d203a944c9d994Affected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 00b0fa425941438b664950a8ee65dfba2def4336Affected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 3317a5d015fca976475aa71df224056777316fdeAffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to before 9647492b5e41954be59d5157eddbcd4cdc1656f7Affected
  • 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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