CVE-2026-64597
smb: client: fix double-free in SMB2_close() replay
CVSS Score
9.8
EPSS Score
0.2%
EPSS Percentile
5th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 6, 2026 |
| Last Updated | Aug 8, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new critical vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
433042a91f9373241307725b52de573933ffedbf < 037511726228aaf165c7067ff2bfc88eaecdf1f3 4f1fffa2376922f3d1d506e49c0fd445b023a28e < 0aa97edf7c347c0f54e7e60c4740574b8120c66a 4f1fffa2376922f3d1d506e49c0fd445b023a28e < d15d83125007f673aec4323e1bbbaaffbe87ea13 4f1fffa2376922f3d1d506e49c0fd445b023a28e < b18ed621dbfceecea5539848cddcb9272c9a61e1 4f1fffa2376922f3d1d506e49c0fd445b023a28e < f96e1cdcb63ed3321142ff2fcdf784e32cda8fee 6.6.32 < 6.6.145
Linux / Linux
6.8
References
git.kernel.org: https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3 git.kernel.org: https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a git.kernel.org: https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13 git.kernel.org: https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1 git.kernel.org: https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee