# md/raid10: fix still_degraded being inverted in raid10_sync_request()

CVE record · `CVE-2026-89558`

- **Identifiers:** `CVE-2026-89558`
- **State:** Confirmed
- **Severity:** CVSS 9.8 Critical
- **Critical:** Yes: CVSS 9+
- **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.

## Critical

Critical, because:

- CVSS score 9.8: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `fe6a19d40ceb44281905485f56dda715e3214e0e to before 9bb8da6ecb330a5b1ac9b96f1e55f134a7aef1d4` (git)
  - affected: `fe6a19d40ceb44281905485f56dda715e3214e0e to before 0efabe6229dc683dbf6eeebd0f9fddc7971ed420` (git)
  - affected: `fe6a19d40ceb44281905485f56dda715e3214e0e to before 00449d752bee9c8787f42ea1bf533a9fb17f9b6b` (git)
  - affected: `fe6a19d40ceb44281905485f56dda715e3214e0e to before 47f1441b281decde6954a2fa82b4131637d685ac` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.12`
  - unaffected: `before 6.12` (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

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

- **CISA KEV:** Not listed.
- **EPSS:** 0.0063, the 51st 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-2026-89558](https://www.cve.org/CVERecord?id=CVE-2026-89558)
- [NVD: CVE-2026-89558](https://nvd.nist.gov/vuln/detail/CVE-2026-89558)

### References from the CNA

- <https://git.kernel.org/stable/c/9bb8da6ecb330a5b1ac9b96f1e55f134a7aef1d4>
- <https://git.kernel.org/stable/c/0efabe6229dc683dbf6eeebd0f9fddc7971ed420>
- <https://git.kernel.org/stable/c/00449d752bee9c8787f42ea1bf533a9fb17f9b6b>
- <https://git.kernel.org/stable/c/47f1441b281decde6954a2fa82b4131637d685ac>

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-2026-89558>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89558/>. Everything for agents: <https://agentprime.io/llms.txt>.