Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_close() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_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.
References5
- git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3
- git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a
- git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1
- git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13
- git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 30 · as of 12 November 2026
- CWE
- CWE-415
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.