# xfrm: espintcp: fix UAF during close

CVE record · `CVE-2026-80848`

- **Identifiers:** `CVE-2026-80848`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 4 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 4 Sept 2026, 15:54 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 29121c5e6591da527e8e36ddac7120dc527f574d` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before ed5d9102190c45fc70121c036b0626b740040b75` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 4bc0dfa28dca6fc0084203732695968049c44072` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before ff8dd7a932f34409a56e1b91a1219340f17457e9` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 4b31a875693c480c611519faca46216514e3e052` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 24efebecf415ba264adba0f0491cec436463a14f` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before eb3bbf29c723fe75c0eb92be14f0ec92971fe272` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before 54b41ad14da9a981131ab6e4d3f79321a503ea5d` (git)
  - affected: `e27cca96cd68fa2c6814c90f9a1cfd36bb68c593 to before deb232e884877bf10b4ce2580909eedec986c284` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.6`
  - unaffected: `before 5.6` (semver)
  - unaffected: `5.10.269 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.220 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.187 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.156 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.108 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.49 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.13 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2.3 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:** 0.0019, the 9th percentile, on 14 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 4 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-80848](https://www.cve.org/CVERecord?id=CVE-2026-80848)
- [NVD: CVE-2026-80848](https://nvd.nist.gov/vuln/detail/CVE-2026-80848)

### References from the CNA

- <https://git.kernel.org/stable/c/29121c5e6591da527e8e36ddac7120dc527f574d>
- <https://git.kernel.org/stable/c/ed5d9102190c45fc70121c036b0626b740040b75>
- <https://git.kernel.org/stable/c/4bc0dfa28dca6fc0084203732695968049c44072>
- <https://git.kernel.org/stable/c/ff8dd7a932f34409a56e1b91a1219340f17457e9>
- <https://git.kernel.org/stable/c/4b31a875693c480c611519faca46216514e3e052>
- <https://git.kernel.org/stable/c/24efebecf415ba264adba0f0491cec436463a14f>
- <https://git.kernel.org/stable/c/eb3bbf29c723fe75c0eb92be14f0ec92971fe272>
- <https://git.kernel.org/stable/c/54b41ad14da9a981131ab6e4d3f79321a503ea5d>
- <https://git.kernel.org/stable/c/deb232e884877bf10b4ce2580909eedec986c284>

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-2026-80848>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80848/>. Everything for agents: <https://agentprime.io/llms.txt>.