CVE-2026-64383
smb: client: fix double-free in SMB2_flush() replay
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 25, 2026 |
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Affected Versions
Linux / Linux
433042a91f9373241307725b52de573933ffedbf < 6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 878757163eea684750107a31ea134c103863515d 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 3407240cde132a4b72d6429a2625a09a2f78adaf 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 013a9a3da46c5dabcf18f65ea6a47874ba12a15d 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a 6.6.32 < 6.6.145
Linux / Linux
6.8
References
git.kernel.org: https://git.kernel.org/stable/c/6e27f40b682a5e42a2daae3ce6d96f0e0e16dedb git.kernel.org: https://git.kernel.org/stable/c/878757163eea684750107a31ea134c103863515d git.kernel.org: https://git.kernel.org/stable/c/3407240cde132a4b72d6429a2625a09a2f78adaf git.kernel.org: https://git.kernel.org/stable/c/013a9a3da46c5dabcf18f65ea6a47874ba12a15d git.kernel.org: https://git.kernel.org/stable/c/4be31c943a3a27a5a0251dbb8f5cb89059ec3d5a