smb/client: zero-initialize stack-allocated cifs_open_info_data
CVE-2026-93801 · published 24 Sept 2026
How serious is it
- Severity: high, CVSS score 7 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-93801?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 436cfdbc57d98808fce427d9a8d97691374989b3 to < 2c5db82778f560121efda9e052e2f19c2d807c1b, fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520 to < 74ff47e6c4213fcfeba2de448d9cbda200507d22, 057ac50638bcece64b3b436d3a61b70ed6c01a34 to < 22532dd88694ed20bdd47523ffa709f166ce776b, 057ac50638bcece64b3b436d3a61b70ed6c01a34 to < 8fce4cf4369c766a3293a05419500cbfde72e60d
- Linux Linux: 6.18
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/2c5db82778f560121efda9e052e2f19c2d807c1b
- git.kernel.org/stable/c/74ff47e6c4213fcfeba2de448d9cbda200507d22
- git.kernel.org/stable/c/22532dd88694ed20bdd47523ffa709f166ce776b
- git.kernel.org/stable/c/8fce4cf4369c766a3293a05419500cbfde72e60d
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON