# mm/page_alloc: don't spin_trylock() in NMI on UP

CVE record · `CVE-2026-90046`

- **Identifiers:** `CVE-2026-90046`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:33 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: `8c57b687e8331eb80e302a2c528b18b966a9ac7a to before 06c76d3c389ff504052f64b1acee44651bd847fa` (git)
  - affected: `8c57b687e8331eb80e302a2c528b18b966a9ac7a to before 68a069b407303e71db371df85036101e8ff59280` (git)
  - affected: `8c57b687e8331eb80e302a2c528b18b966a9ac7a to before 3105ae628fb785d48b49256468be4f21a7b3cfc0` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.15`
  - unaffected: `before 6.15` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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 13 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90046](https://www.cve.org/CVERecord?id=CVE-2026-90046)
- [NVD: CVE-2026-90046](https://nvd.nist.gov/vuln/detail/CVE-2026-90046)

### References from the CNA

- <https://git.kernel.org/stable/c/06c76d3c389ff504052f64b1acee44651bd847fa>
- <https://git.kernel.org/stable/c/68a069b407303e71db371df85036101e8ff59280>
- <https://git.kernel.org/stable/c/3105ae628fb785d48b49256468be4f21a7b3cfc0>

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-2026-90046>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90046/>. Everything for agents: <https://agentprime.io/llms.txt>.