# s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()

CVE record · `CVE-2026-98476`

- **Identifiers:** `CVE-2026-98476`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:15 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: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 9d8b21820caed9128945fffcedf03e2a4c21eee2` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 5fc54e04dad90b15d0430118b3f288a1d64e66c9` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 27e396a89f76f742abdbe9f8c4a58a6e806fdf59` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before dbf30e661ceb9a52c94c85719716391dcc29142a` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 5e006ac90a4d331db1dd712b91fec849b45ffc01` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before c3bbcb32deecc06ebb1762398399b566d5ff2fc9` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 44b16b02608058fc72198ac0205969f0f43065df` (git)
  - affected: `199652309a4d6635fca19d7528d73ab9e219bd9a to before 5b76268dac968612f7283d59b539036de955b7d9` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.18`
  - unaffected: `before 4.18` (semver)
  - unaffected: `5.10.271 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.222 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.189 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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:** 0.0018, the 7th percentile, on 9 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98476](https://www.cve.org/CVERecord?id=CVE-2026-98476)
- [NVD: CVE-2026-98476](https://nvd.nist.gov/vuln/detail/CVE-2026-98476)

### References from the CNA

- <https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2>
- <https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9>
- <https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59>
- <https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a>
- <https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01>
- <https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9>
- <https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df>
- <https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9>

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-2026-98476>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-98476/>. Everything for agents: <https://agentprime.io/llms.txt>.