PT-2026-64604 · Linux · Linux

CVE-2026-64383 · Published 2026-07-25 · Updated 2026-07-25

NVD

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.

Related Identifiers

CVE-2026-64383

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-64383 · Security Note
• https://git.kernel.org/stable/c/3407240cde132a4b72d6429a2625a09a2f78adaf · Note
• https://git.kernel.org/stable/c/013a9a3da46c5dabcf18f65ea6a47874ba12a15d · Note
• https://git.kernel.org/stable/c/878757163eea684750107a31ea134c103863515d · Note
• https://git.kernel.org/stable/c/4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a · Note
• https://git.kernel.org/stable/c/6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb · Note