# tty: serial: 8250: protect against NULL uart->port.dev in register

CVE record · `CVE-2026-97480`

- **Identifiers:** `CVE-2026-97480`
- **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:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 24 Sept 2026, 16:04 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: `4a96895f74c9633b51427fd080ab70fa62b65bc4 to before f728f7f38a6eca16923c72fc6826445810d2b41f` (git)
  - affected: `4a96895f74c9633b51427fd080ab70fa62b65bc4 to before 68059b6e9f7292714286e2b0f5185ed2a43fccc5` (git)
  - affected: `4a96895f74c9633b51427fd080ab70fa62b65bc4 to before 9c78f89cf2fbae18b14c78bf172ca15d832aff15` (git)
  - affected: `4a96895f74c9633b51427fd080ab70fa62b65bc4 to before 5cbab666721d974bfe033a12045d808936deaefd` (git)
  - affected: `4a96895f74c9633b51427fd080ab70fa62b65bc4 to before 941c9f84c9b6310f7aaa1c8c785dcc634ee33050` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.3`
  - unaffected: `before 5.3` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel 8250 serial driver, from version 5.3, can dereference a NULL pointer when registering a port without a parent device, crashing the kernel. The source gives few details on who can trigger it. Upgrade to 6.1.191, 6.6.160, 6.12.114, 6.18.53, or a later release in those series.

Written 12 Nov 2026.

## 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 12 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-2026-97480](https://www.cve.org/CVERecord?id=CVE-2026-97480)
- [NVD: CVE-2026-97480](https://nvd.nist.gov/vuln/detail/CVE-2026-97480)

### References from the CNA

- <https://git.kernel.org/stable/c/f728f7f38a6eca16923c72fc6826445810d2b41f>
- <https://git.kernel.org/stable/c/68059b6e9f7292714286e2b0f5185ed2a43fccc5>
- <https://git.kernel.org/stable/c/9c78f89cf2fbae18b14c78bf172ca15d832aff15>
- <https://git.kernel.org/stable/c/5cbab666721d974bfe033a12045d808936deaefd>
- <https://git.kernel.org/stable/c/941c9f84c9b6310f7aaa1c8c785dcc634ee33050>

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-2026-97480>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-97480/>. Everything for agents: <https://agentprime.io/llms.txt>.