# smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

CVE record · `CVE-2026-90166`

- **Identifiers:** `CVE-2026-90166`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 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: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before d601be98c9445894c759c28d4a7a52151387f1fb` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 5ffd180307a5ea34dae7f90ff9573ebed6b7fb12` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 4eb74a34ea401abfbbd5991076715dae3de938df` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 8461f27902727ad434375caf13a0100aafc0340f` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before 7065d3648b1a48d2c49da3d6364dd3c4d503b10c` (git)
  - affected: `e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 to before d2ccf905f47d2344270749f4dfa905afcd3edeb0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.15`
  - unaffected: `before 5.15` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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:** 0.0021, the 10th 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90166](https://www.cve.org/CVERecord?id=CVE-2026-90166)
- [NVD: CVE-2026-90166](https://nvd.nist.gov/vuln/detail/CVE-2026-90166)

### References from the CNA

- <https://git.kernel.org/stable/c/d601be98c9445894c759c28d4a7a52151387f1fb>
- <https://git.kernel.org/stable/c/5ffd180307a5ea34dae7f90ff9573ebed6b7fb12>
- <https://git.kernel.org/stable/c/4eb74a34ea401abfbbd5991076715dae3de938df>
- <https://git.kernel.org/stable/c/8461f27902727ad434375caf13a0100aafc0340f>
- <https://git.kernel.org/stable/c/7065d3648b1a48d2c49da3d6364dd3c4d503b10c>
- <https://git.kernel.org/stable/c/d2ccf905f47d2344270749f4dfa905afcd3edeb0>

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-2026-90166>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90166/>. Everything for agents: <https://agentprime.io/llms.txt>.