# io_uring/rsrc: fix folio size overflow in io_vec_fill_bvec()

CVE record · `CVE-2026-80810`

- **Identifiers:** `CVE-2026-80810`
- **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, 15:13 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: `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 to before 45c945107e007b1fb73e21cd220277652a45521a` (git)
  - affected: `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 to before 6b308c37fbeba3aa8c634fb1ed53e2f63a5d5a5c` (git)
  - affected: `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 to before 3267d7c8ba51642117f7bdd1ece02b2540668476` (git)
  - affected: `9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 to before 3f3a6a16bbe8bde76532d9415438f8cdef439e5d` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.15`
  - unaffected: `before 6.15` (semver)
  - unaffected: `6.18.47 to 6.18.*, inclusive` (semver)
  - unaffected: `7.1.11 to 7.1.*, inclusive` (semver)
  - unaffected: `7.2.1 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 11th 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-2026-80810](https://www.cve.org/CVERecord?id=CVE-2026-80810)
- [NVD: CVE-2026-80810](https://nvd.nist.gov/vuln/detail/CVE-2026-80810)

### References from the CNA

- <https://git.kernel.org/stable/c/45c945107e007b1fb73e21cd220277652a45521a>
- <https://git.kernel.org/stable/c/6b308c37fbeba3aa8c634fb1ed53e2f63a5d5a5c>
- <https://git.kernel.org/stable/c/3267d7c8ba51642117f7bdd1ece02b2540668476>
- <https://git.kernel.org/stable/c/3f3a6a16bbe8bde76532d9415438f8cdef439e5d>

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-2026-80810>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-80810/>. Everything for agents: <https://agentprime.io/llms.txt>.