# arm64: io: Reject non-user protection in ioremap_prot()

CVE record · `CVE-2026-98923`

- **Identifiers:** `CVE-2026-98923`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 23 Oct 2026
- **Updated:** 23 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 23 Oct 2026, 12:03 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: `64858b76ec67c5fc40fef8ec1841fecb78c1ebde to before fddc90d4af4550af410f52d11bbf6b5f36443838` (git)
  - affected: `eeecafce5afffb4da703666ebefbd4d6e2a5abf6 to before 0b04af3d88bb7fc69b2d92457890608860e42365` (git)
  - affected: `3d64dcc0799c2d6921ba027716b7be721eb19fa8 to before b17aa4955e3a694c663ebe99626e4c76ca4f7cfb` (git)
  - affected: `8f098037139b294050053123ab2bc0f819d08932 to before 9b583795feb51f8d50203228d001760d1344ef01` (git)
  - affected: `8f098037139b294050053123ab2bc0f819d08932 to before bb756b11ad63832ebee58caf9e8f9381eaecff9f` (git)
  - affected: `d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a` (git)
  - affected: `6.6.143 to before 6.6.158` (semver)
  - affected: `6.12.93 to before 6.12.112` (semver)
  - affected: `6.18.17 to before 6.18.55` (semver)
  - affected: `6.19.7 to before 6.20` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `7.0`
  - unaffected: `before 7.0` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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:** 0.0017, the 6th percentile, on 7 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 23 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98923](https://www.cve.org/CVERecord?id=CVE-2026-98923)
- [NVD: CVE-2026-98923](https://nvd.nist.gov/vuln/detail/CVE-2026-98923)

### References from the CNA

- <https://git.kernel.org/stable/c/fddc90d4af4550af410f52d11bbf6b5f36443838>
- <https://git.kernel.org/stable/c/0b04af3d88bb7fc69b2d92457890608860e42365>
- <https://git.kernel.org/stable/c/b17aa4955e3a694c663ebe99626e4c76ca4f7cfb>
- <https://git.kernel.org/stable/c/9b583795feb51f8d50203228d001760d1344ef01>
- <https://git.kernel.org/stable/c/bb756b11ad63832ebee58caf9e8f9381eaecff9f>

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-2026-98923>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98923/>. Everything for agents: <https://agentprime.io/llms.txt>.