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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-64383

smb: client: fix double-free in SMB2_flush() replay

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_flush() replay SMB2_flush() keeps its response buffer bookkeeping across replay attempts. If a replayable flush response is received and the retry then fails before cifs_send_recv() stores a replacement response, flush_exit will free the stale response pointer a second time. Reinitialize resp_buftype and rsp_iov at the top of the replay loop so cleanup only acts on response state produced by the current attempt. This fixes a double-free without changing replay handling for successful requests.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 433042a91f9373241307725b52de573933ffedbf to < 6e27f40b682a5e42a2daae3ce6d96f0e0e16dedbaffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to < 878757163eea684750107a31ea134c103863515daffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to < 3407240cde132a4b72d6429a2625a09a2f78adafaffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to < 013a9a3da46c5dabcf18f65ea6a47874ba12a15daffected
  • 4f1fffa2376922f3d1d506e49c0fd445b023a28e to < 4be31c943a3a27a5a0251dbb8f5cb89059ec3d5aaffected
  • 6.6.32 to < 6.6.145affected

Linux Linux

Default version status: affected

  • 6.8affected
  • 0 to < 6.8unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.96 to ≤ 6.12.*unaffected
  • 6.18.39 to ≤ 6.18.*unaffected
  • 7.1.4 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References