# netfilter: nft_ct: skip expectations for confirmed conntrack

CVE record · `CVE-2021-47129`

- **Identifiers:** `CVE-2021-47129`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-273](https://cwe.mitre.org/data/definitions/273.html)
- **Tags:** [CWE-273](https://agentprime.io/advisories/tag/cwe-273.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 15 Mar 2024
- **Updated:** 5 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 15 Mar 2024, 20:14 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: `857b46027d6f91150797295752581b7155b9d0e1 to before da8d31e80ff425f5a65dab7060d5c4aba749e562` (git)
  - affected: `857b46027d6f91150797295752581b7155b9d0e1 to before 5f3429c05e4028a0e241afdad856dd15dec2ffb9` (git)
  - affected: `857b46027d6f91150797295752581b7155b9d0e1 to before 2c0e6b35b88a961127066a1028bce9c727cbc3e5` (git)
  - affected: `857b46027d6f91150797295752581b7155b9d0e1 to before 1710eb913bdcda3917f44d383c32de6bdabfc836` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `5.3`
  - unaffected: `before 5.3` (semver)
  - unaffected: `5.4.125 to 5.4.*, inclusive` (semver)
  - unaffected: `5.10.43 to 5.10.*, inclusive` (semver)
  - unaffected: `5.12.10 to 5.12.*, inclusive` (semver)
  - unaffected: `5.13 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux) (used for this record)
- 4.6 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N`, from ADP (CISA-ADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0045, the 38th percentile, on 5 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 15 Mar 2024. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2021-47129](https://www.cve.org/CVERecord?id=CVE-2021-47129)
- [NVD: CVE-2021-47129](https://nvd.nist.gov/vuln/detail/CVE-2021-47129)

### References from the CNA

- <https://git.kernel.org/stable/c/da8d31e80ff425f5a65dab7060d5c4aba749e562>
- <https://git.kernel.org/stable/c/5f3429c05e4028a0e241afdad856dd15dec2ffb9>
- <https://git.kernel.org/stable/c/2c0e6b35b88a961127066a1028bce9c727cbc3e5>
- <https://git.kernel.org/stable/c/1710eb913bdcda3917f44d383c32de6bdabfc836>

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-2021-47129>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2021-47129/>. Everything for agents: <https://agentprime.io/llms.txt>.