# net: lan743x: fix RX checksum use-after-free

CVE record · `CVE-2026-98239`

- **Identifiers:** `CVE-2026-98239`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:45 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: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before 0e52886c4324c9897c2c62f92be3dc8316cee67e` (git)
  - affected: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before a58024835c704419bb46d2a34e5223f65605f958` (git)
  - affected: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before 6fe5c3a2503983abb431d93faeadfc7f5e6a7e33` (git)
  - affected: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before 5c216bfa9fb7b36804485e67975e9c98055b31ef` (git)
  - affected: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before 161a403c8625e152de03d1da22bbf9cda6dc9f9f` (git)
  - affected: `cd6910501cfd9a3bdff2f5fc33c9f3cf165ca54a to before a9ce4053dc945c5372dedba5017ee675b30dc0c5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.1`
  - unaffected: `before 6.1` (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

- 8.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0043, the 38th percentile, on 10 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 6 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98239](https://www.cve.org/CVERecord?id=CVE-2026-98239)
- [NVD: CVE-2026-98239](https://nvd.nist.gov/vuln/detail/CVE-2026-98239)

### References from the CNA

- <https://git.kernel.org/stable/c/0e52886c4324c9897c2c62f92be3dc8316cee67e>
- <https://git.kernel.org/stable/c/a58024835c704419bb46d2a34e5223f65605f958>
- <https://git.kernel.org/stable/c/6fe5c3a2503983abb431d93faeadfc7f5e6a7e33>
- <https://git.kernel.org/stable/c/5c216bfa9fb7b36804485e67975e9c98055b31ef>
- <https://git.kernel.org/stable/c/161a403c8625e152de03d1da22bbf9cda6dc9f9f>
- <https://git.kernel.org/stable/c/a9ce4053dc945c5372dedba5017ee675b30dc0c5>

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-2026-98239>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98239/>. Everything for agents: <https://agentprime.io/llms.txt>.