# net: xfrm: reject unrepresentable espintcp transport headers

CVE record · `CVE-2026-98417`

- **Identifiers:** `CVE-2026-98417`
- **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, 13:27 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: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 6c29681207bc213188afa603dff2d55e7178a341` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 4a8243fd2e21980fa3fd10c0610e9155057cebd3` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before b2b84e73e0386ad0b4f9b8d3afde343e761f5275` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 327b2a457dd7d5445f7395f371f3c65de79bd5ce` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before cce630c751279e974fa0bb574d80575e0cc7e8f3` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 96f01b53c2d05e003b040892256de54a586e8529` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.6`
  - unaffected: `before 5.6` (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: `6.18.54 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.8 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:** 0.0022, the 12th 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 14 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98417](https://www.cve.org/CVERecord?id=CVE-2026-98417)
- [NVD: CVE-2026-98417](https://nvd.nist.gov/vuln/detail/CVE-2026-98417)

### References from the CNA

- <https://git.kernel.org/stable/c/d37a5b87577c4b4c1a1dcb000a9dff1df2cf886b>
- <https://git.kernel.org/stable/c/6c29681207bc213188afa603dff2d55e7178a341>
- <https://git.kernel.org/stable/c/4a8243fd2e21980fa3fd10c0610e9155057cebd3>
- <https://git.kernel.org/stable/c/b2b84e73e0386ad0b4f9b8d3afde343e761f5275>
- <https://git.kernel.org/stable/c/327b2a457dd7d5445f7395f371f3c65de79bd5ce>
- <https://git.kernel.org/stable/c/cce630c751279e974fa0bb574d80575e0cc7e8f3>
- <https://git.kernel.org/stable/c/206f396f46149dc8bc4dfd2b54b9879ba3ee1d7d>
- <https://git.kernel.org/stable/c/96f01b53c2d05e003b040892256de54a586e8529>

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-2026-98417>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98417/>. Everything for agents: <https://agentprime.io/llms.txt>.