# SUNRPC: check rpc_sockaddr2uaddr() return value in rpcb_register_inet4/6

CVE record · `CVE-2026-89784`

- **Identifiers:** `CVE-2026-89784`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 08:48 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: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before 04441b792ec40eb66349b5fab34b6a2090b5b2dd` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before 5a51c49ddb37b883566874aecc66bc5a2e617a96` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before 4a6095de8cb1858e05bdf70b3e7d6d7645c25041` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before 12bf3e0182ccdaf3b412756a756d3944a7dacaa9` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before 4e01022974355732e748ec8ebc97c558cb624ffe` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before cda4aacfb0bbf5c0f90fd0b42c72c749635d1368` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6` (git)
  - affected: `d77385f23830ee6c400569bac8b37e6eb3b7d360 to before fd22370226a0d8109045d0831fd5aaadee921693` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.2`
  - unaffected: `before 3.2` (semver)
  - unaffected: `5.10.270 to 5.10.*, inclusive` (semver)
  - unaffected: `5.15.221 to 5.15.*, inclusive` (semver)
  - unaffected: `6.1.188 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89784](https://www.cve.org/CVERecord?id=CVE-2026-89784)
- [NVD: CVE-2026-89784](https://nvd.nist.gov/vuln/detail/CVE-2026-89784)

### References from the CNA

- <https://git.kernel.org/stable/c/04441b792ec40eb66349b5fab34b6a2090b5b2dd>
- <https://git.kernel.org/stable/c/5a51c49ddb37b883566874aecc66bc5a2e617a96>
- <https://git.kernel.org/stable/c/4a6095de8cb1858e05bdf70b3e7d6d7645c25041>
- <https://git.kernel.org/stable/c/12bf3e0182ccdaf3b412756a756d3944a7dacaa9>
- <https://git.kernel.org/stable/c/4e01022974355732e748ec8ebc97c558cb624ffe>
- <https://git.kernel.org/stable/c/cda4aacfb0bbf5c0f90fd0b42c72c749635d1368>
- <https://git.kernel.org/stable/c/eb476289c12cc22c8766f8a84eeb7ab46c4e8fb6>
- <https://git.kernel.org/stable/c/fd22370226a0d8109045d0831fd5aaadee921693>

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-2026-89784>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89784/>. Everything for agents: <https://agentprime.io/llms.txt>.