CVE-2026-64386
Published Jul 25, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_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.
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EPSS — Exploit Prediction
0.0021
Probability of exploitation
0.11%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://git.kernel.org/stable/c/100fb7c455fa86d248b8bd7bb9de757c192870b4
https://git.kernel.org/stable/c/2a88561d66eb855813cf004a0abe648bbb17de5e
https://git.kernel.org/stable/c/3c81dda84799f76b42aec598564316e2964440db
https://git.kernel.org/stable/c/89234773e8348918111aa15f6922b58cf3843364
https://git.kernel.org/stable/c/f1add4acb656f5a82806a1ab0e63fed3d8b1bfca
Frequently Asked Questions
What is CVE-2026-64386? +
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix query_info() replay double-free
A response-bearing attempt can return a replayable error and free its
response buffer. If SMB2_query_info_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.
How do I check if I'm vulnerable to CVE-2026-64386? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.