What’s Vulnerable › Vulnerabilities

CVE-2026-93801: smb/client: zero-initialize stack-allocated cifs_open_info_data

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: smb/client: zero-initialize stack-allocated cifs_open_info_data Stack-allocated cifs_open_info_data may contain random data. This can make some fields have wrong value if they are not set later.

Affected products

• Linux kernel: from 6.6.113 before 6.6.160; from 6.12.54 before 6.12.111; from 6.17.4 before 6.18; 6.18 — fixed in 6.12.111, 6.18, 6.6.160, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.12.111, 6.18, 6.6.160, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/22532dd88694ed20bdd47523ffa709f166ce776b
• https://git.kernel.org/stable/c/2c5db82778f560121efda9e052e2f19c2d807c1b
• https://git.kernel.org/stable/c/74ff47e6c4213fcfeba2de448d9cbda200507d22
• https://git.kernel.org/stable/c/8fce4cf4369c766a3293a05419500cbfde72e60d

Get alerted when CVE-2026-93801 or the next vulnerability affects your stack