# SUNRPC: always drain cache_cleaner before destroying a cache_detail

CVE record · `CVE-2026-89548`

- **Identifiers:** `CVE-2026-89548`
- **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, 19:44 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: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before dec787a15c96a5665e9ffc61b429a6a4ab26e6b9` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before 5eea874a696201c31e7c2d7badbfa0d90e9961b5` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before cf239de7fdcc8336259b01ea4bcf650dadad1040` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before 6d74ecc2be120a0c300b224b7649fe93c0453714` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before 9d44836f60c8c29bcdb1471fd9202387c642a890` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before 2e861ce2aaa468351a6a47c4cbb4971ebb740c7b` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before 3d60fdf951143d6ef4e352e2f8eb852286701726` (git)
  - affected: `820f9442e711a81749e70c40f149fc54c4ce0ca8 to before f42d0fda0c67695db6bc704b04b7c10240805377` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.4`
  - unaffected: `before 3.4` (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: `6.12.109 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:** 0.0013, the 2nd 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-2026-89548](https://www.cve.org/CVERecord?id=CVE-2026-89548)
- [NVD: CVE-2026-89548](https://nvd.nist.gov/vuln/detail/CVE-2026-89548)

### References from the CNA

- <https://git.kernel.org/stable/c/dec787a15c96a5665e9ffc61b429a6a4ab26e6b9>
- <https://git.kernel.org/stable/c/5eea874a696201c31e7c2d7badbfa0d90e9961b5>
- <https://git.kernel.org/stable/c/cf239de7fdcc8336259b01ea4bcf650dadad1040>
- <https://git.kernel.org/stable/c/6d74ecc2be120a0c300b224b7649fe93c0453714>
- <https://git.kernel.org/stable/c/9d44836f60c8c29bcdb1471fd9202387c642a890>
- <https://git.kernel.org/stable/c/2e861ce2aaa468351a6a47c4cbb4971ebb740c7b>
- <https://git.kernel.org/stable/c/3d60fdf951143d6ef4e352e2f8eb852286701726>
- <https://git.kernel.org/stable/c/f42d0fda0c67695db6bc704b04b7c10240805377>

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-2026-89548>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89548/>. Everything for agents: <https://agentprime.io/llms.txt>.