# nfsd: defer vfree of compound ops to fix rpc_status UAF

CVE record · `CVE-2026-89690`

- **Identifiers:** `CVE-2026-89690`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 11 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:46 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: `bd9d6a3efa9709e653aafbeb859289feccb8e70c to before 48f72aff24f7a7329209dc6cbc27c869f3e3595c` (git)
  - affected: `bd9d6a3efa9709e653aafbeb859289feccb8e70c to before 6703199f4d7e7f37d6a726a849eb358e8fae72fb` (git)
  - affected: `bd9d6a3efa9709e653aafbeb859289feccb8e70c to before 19413ccc45070a7270b9e25c2a258daf7f91de42` (git)
  - affected: `bd9d6a3efa9709e653aafbeb859289feccb8e70c to before fca26a3fc19ed02278aa2a150af82d43db0302cb` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.7`
  - unaffected: `before 6.7` (semver)
  - unaffected: `6.12.109 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.50 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.4 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

- 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)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th 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 11 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89690](https://www.cve.org/CVERecord?id=CVE-2026-89690)
- [NVD: CVE-2026-89690](https://nvd.nist.gov/vuln/detail/CVE-2026-89690)

### References from the CNA

- <https://git.kernel.org/stable/c/48f72aff24f7a7329209dc6cbc27c869f3e3595c>
- <https://git.kernel.org/stable/c/6703199f4d7e7f37d6a726a849eb358e8fae72fb>
- <https://git.kernel.org/stable/c/19413ccc45070a7270b9e25c2a258daf7f91de42>
- <https://git.kernel.org/stable/c/fca26a3fc19ed02278aa2a150af82d43db0302cb>

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-2026-89690>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89690/>. Everything for agents: <https://agentprime.io/llms.txt>.