# openrisc: fix arbitrary kernel memory access via or1k_atomic syscall

CVE record · `CVE-2026-89489`

- **Identifiers:** `CVE-2026-89489`
- **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, 19:43 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: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before bf310718c6fa6adeee06d207a55489546d860e2c` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before 497cba0b02e5555d99fe9ee1dc478af743ab7f7a` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before 1f2e92e499d863f81df1732af59b4a3559969193` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before 574ae2ac2b314aa33498cd2c28add106cbe644f2` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before a520e8cac54fb403f3800125b606f55fcad42cb9` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before d64a75369cd0f2ee79afcc9d9ca34a3890989379` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before b53435c079c78f89f70a62dd5a322cca4e292b34` (git)
  - affected: `9d02a4283e9ce4e9ca11ff00615bdacdb0515a1a to before 78004e9a87f240df03e2f73120d291763c32e0a7` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `3.1`
  - unaffected: `before 3.1` (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:** 0.0014, the 3rd 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-2026-89489](https://www.cve.org/CVERecord?id=CVE-2026-89489)
- [NVD: CVE-2026-89489](https://nvd.nist.gov/vuln/detail/CVE-2026-89489)

### References from the CNA

- <https://git.kernel.org/stable/c/bf310718c6fa6adeee06d207a55489546d860e2c>
- <https://git.kernel.org/stable/c/497cba0b02e5555d99fe9ee1dc478af743ab7f7a>
- <https://git.kernel.org/stable/c/1f2e92e499d863f81df1732af59b4a3559969193>
- <https://git.kernel.org/stable/c/574ae2ac2b314aa33498cd2c28add106cbe644f2>
- <https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9>
- <https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379>
- <https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34>
- <https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7>

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-2026-89489>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

---

The web page: <https://agentprime.io/advisories/CVE-2026-89489/>. Everything for agents: <https://agentprime.io/llms.txt>.