# smb/client: zero-initialize stack-allocated cifs_open_info_data

CVE record · `CVE-2026-93801`

- **Identifiers:** `CVE-2026-93801`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `436cfdbc57d98808fce427d9a8d97691374989b3 to before 2c5db82778f560121efda9e052e2f19c2d807c1b` (git)
  - affected: `fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520 to before 74ff47e6c4213fcfeba2de448d9cbda200507d22` (git)
  - affected: `057ac50638bcece64b3b436d3a61b70ed6c01a34 to before 22532dd88694ed20bdd47523ffa709f166ce776b` (git)
  - affected: `057ac50638bcece64b3b436d3a61b70ed6c01a34 to before 8fce4cf4369c766a3293a05419500cbfde72e60d` (git)
  - affected: `83d3bc866530a36a465b47cce4d2a9def2411960` (git)
  - affected: `6.6.113 to before 6.6.160` (semver)
  - affected: `6.12.54 to before 6.12.111` (semver)
  - affected: `6.17.4 to before 6.18` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.18`
  - unaffected: `before 6.18` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.111 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 24 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-93801](https://www.cve.org/CVERecord?id=CVE-2026-93801)
- [NVD: CVE-2026-93801](https://nvd.nist.gov/vuln/detail/CVE-2026-93801)

### References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-93801>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93801/>. Everything for agents: <https://agentprime.io/llms.txt>.