smb: client: fix double-free in SMB2_flush() replay
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.8epss 0.5%
exploitation probability
0.5%top 63% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/013a9a3da46c5dabcf18f65ea6a47874ba12a15dhttps://git.kernel.org/stable/c/3407240cde132a4b72d6429a2625a09a2f78adafhttps://git.kernel.org/stable/c/4be31c943a3a27a5a0251dbb8f5cb89059ec3d5ahttps://git.kernel.org/stable/c/6e27f40b682a5e42a2daae3ce6d96f0e0e16dedbhttps://git.kernel.org/stable/c/878757163eea684750107a31ea134c103863515d