# smb: client: harden DFS cache against invalid target hints

CVE record · `CVE-2026-93210`

- **Identifiers:** `CVE-2026-93210`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 24 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 15:10 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: `54be1f6c1c37498bba557049df646cc239fa37e3 to before a48328afbc3f63e3b9de8827e2e16c15b17976f7` (git)
  - affected: `54be1f6c1c37498bba557049df646cc239fa37e3 to before 6cb7f9fed8f40f28fbd464ca99c946951afc0952` (git)
  - affected: `54be1f6c1c37498bba557049df646cc239fa37e3 to before 66dbcdbb0cadffd12eb8f2b115fd57d384c5109d` (git)
  - affected: `54be1f6c1c37498bba557049df646cc239fa37e3 to before 846f0709559b9e27024e126a80bc7afb76516912` (git)
  - affected: `54be1f6c1c37498bba557049df646cc239fa37e3 to before 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2` (git)
  - affected: `54be1f6c1c37498bba557049df646cc239fa37e3 to before bf86c08123c6ab8c61cc0be1dad7540db93738ff` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.0`
  - unaffected: `before 5.0` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 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

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0017, the 6th 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-2026-93210](https://www.cve.org/CVERecord?id=CVE-2026-93210)
- [NVD: CVE-2026-93210](https://nvd.nist.gov/vuln/detail/CVE-2026-93210)

### References from the CNA

- <https://git.kernel.org/stable/c/a48328afbc3f63e3b9de8827e2e16c15b17976f7>
- <https://git.kernel.org/stable/c/6cb7f9fed8f40f28fbd464ca99c946951afc0952>
- <https://git.kernel.org/stable/c/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d>
- <https://git.kernel.org/stable/c/846f0709559b9e27024e126a80bc7afb76516912>
- <https://git.kernel.org/stable/c/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2>
- <https://git.kernel.org/stable/c/bf86c08123c6ab8c61cc0be1dad7540db93738ff>

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-2026-93210>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-93210/>. Everything for agents: <https://agentprime.io/llms.txt>.