# s390/boot: Avoid IPL parameter append past command line

CVE record · `CVE-2026-98403`

- **Identifiers:** `CVE-2026-98403`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 14 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 14 Oct 2026, 13:26 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: `5ecb2da660ab8eddafe059a6a8a708465db89ca2 to before af9866021a00ab9eeacf0c33ee73f3d134b4ed70` (git)
  - affected: `5ecb2da660ab8eddafe059a6a8a708465db89ca2 to before 73eec5a0d55916d7e1115f5d03a7ffc06d6215cf` (git)
  - affected: `5ecb2da660ab8eddafe059a6a8a708465db89ca2 to before 8d11bfec8666f8409fac9072e9c25b691d3e30ac` (git)
  - affected: `5ecb2da660ab8eddafe059a6a8a708465db89ca2 to before d76181dfabdaa720703167393704efacba343442` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.16`
  - unaffected: `before 5.16` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.53 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.7 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 8 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 14 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98403](https://www.cve.org/CVERecord?id=CVE-2026-98403)
- [NVD: CVE-2026-98403](https://nvd.nist.gov/vuln/detail/CVE-2026-98403)

### References from the CNA

- <https://git.kernel.org/stable/c/af9866021a00ab9eeacf0c33ee73f3d134b4ed70>
- <https://git.kernel.org/stable/c/73eec5a0d55916d7e1115f5d03a7ffc06d6215cf>
- <https://git.kernel.org/stable/c/8d11bfec8666f8409fac9072e9c25b691d3e30ac>
- <https://git.kernel.org/stable/c/d76181dfabdaa720703167393704efacba343442>

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-2026-98403>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98403/>. Everything for agents: <https://agentprime.io/llms.txt>.