# xsk: Use a 32-bit compare in xsk_map_gen_lookup

CVE record · `CVE-2026-98631`

- **Identifiers:** `CVE-2026-98631`
- **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, 15:19 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: `e65650f291ee72fc578d6346080fc4699204ef2c to before c6d5c582d55a8f229d75e98d62eaa065b0deb18d` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 227ec890559e922e235eb543646e3bf0bd8269b0` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 11d9be35c1f4233798e99be98bc474f83a254c6c` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 123f90f394ca404ab8796a7c8072ff7fa5b65a9c` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 36461e58f88a1b723f86693f437ac12e60ff4363` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before b5c0cff0c5331582ab01c4c423731453a8381acc` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24` (git)
  - affected: `e65650f291ee72fc578d6346080fc4699204ef2c to before 70504de0bb627848667207bec7ccfd647deb8814` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.5`
  - unaffected: `before 5.5` (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:** 0.0021, the 11th 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98631](https://www.cve.org/CVERecord?id=CVE-2026-98631)
- [NVD: CVE-2026-98631](https://nvd.nist.gov/vuln/detail/CVE-2026-98631)

### References from the CNA

- <https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d>
- <https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0>
- <https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c>
- <https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c>
- <https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363>
- <https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc>
- <https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24>
- <https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814>

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-2026-98631>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98631/>. Everything for agents: <https://agentprime.io/llms.txt>.