# net: skbuff: fix pull-bound underflow in skb_checksum_setup_ipv6()

CVE record · `CVE-2026-98573`

- **Identifiers:** `CVE-2026-98573`
- **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, 15:18 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: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before 9c4e432132a97b82edf28fa172c39f743e6bfb26` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before 718747afa5463d9cc5fd9a09f03b2a492edd9b78` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before a0ad0473c09d2e947aecac5c82e637ec85924b12` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before b2da5ed3d8c75e1b729a21b6d3beaed415e263f6` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before 6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before d7f474226809471dc7877435e9c492cc914df0bf` (git)
  - affected: `1431fb31ecbaba1b5718006128f0f2ed0b94e1c3 to before 3b4e0b0c008a8c1b474730248cd5b873026c74bd` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.13`
  - unaffected: `before 3.13` (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:** 0.0022, the 12th percentile, on 7 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-2026-98573](https://www.cve.org/CVERecord?id=CVE-2026-98573)
- [NVD: CVE-2026-98573](https://nvd.nist.gov/vuln/detail/CVE-2026-98573)

### References from the CNA

- <https://git.kernel.org/stable/c/9c4e432132a97b82edf28fa172c39f743e6bfb26>
- <https://git.kernel.org/stable/c/718747afa5463d9cc5fd9a09f03b2a492edd9b78>
- <https://git.kernel.org/stable/c/a0ad0473c09d2e947aecac5c82e637ec85924b12>
- <https://git.kernel.org/stable/c/b2da5ed3d8c75e1b729a21b6d3beaed415e263f6>
- <https://git.kernel.org/stable/c/6c28c31f051dbf49c71ba7ab7bb9bc905fa1d14b>
- <https://git.kernel.org/stable/c/cfa643f2ca36c6f913fe1a2ceb12412ebb0fd962>
- <https://git.kernel.org/stable/c/d7f474226809471dc7877435e9c492cc914df0bf>
- <https://git.kernel.org/stable/c/3b4e0b0c008a8c1b474730248cd5b873026c74bd>

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-2026-98573>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98573/>. Everything for agents: <https://agentprime.io/llms.txt>.