# ARM: 9485/1: mm: acquire mmap write lock around show_pte() for user faults

CVE record · `CVE-2026-90303`

- **Identifiers:** `CVE-2026-90303`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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: `6d021b724481fbb908eb29384898deb9f00dfe70 to before ab14f07952adfe735d86a53518f8cd576dfd5892` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 07e4d5380f2a844ab7a1b440dde350caf561cbb0` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 2a14d7797a49a47bccd1a9327fd69da838dcb0dd` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 63e3c958a602d0896a101a897c2361878c266ca7` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 59bbf86d0ff9373bfa033ca123c1e924f09f1eba` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before c71f9a56520b419e55d173052629f2324deb5549` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 720408d98d9fb3c91a12090436734c8c61f04545` (git)
  - affected: `6d021b724481fbb908eb29384898deb9f00dfe70 to before 1039bffd6ae9c75b42b7d148d6c1106134107b66` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.0`
  - unaffected: `before 4.0` (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: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.52 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 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:** 0.0022, the 12th 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90303](https://www.cve.org/CVERecord?id=CVE-2026-90303)
- [NVD: CVE-2026-90303](https://nvd.nist.gov/vuln/detail/CVE-2026-90303)

### References from the CNA

- <https://git.kernel.org/stable/c/ab14f07952adfe735d86a53518f8cd576dfd5892>
- <https://git.kernel.org/stable/c/07e4d5380f2a844ab7a1b440dde350caf561cbb0>
- <https://git.kernel.org/stable/c/2a14d7797a49a47bccd1a9327fd69da838dcb0dd>
- <https://git.kernel.org/stable/c/63e3c958a602d0896a101a897c2361878c266ca7>
- <https://git.kernel.org/stable/c/59bbf86d0ff9373bfa033ca123c1e924f09f1eba>
- <https://git.kernel.org/stable/c/c71f9a56520b419e55d173052629f2324deb5549>
- <https://git.kernel.org/stable/c/720408d98d9fb3c91a12090436734c8c61f04545>
- <https://git.kernel.org/stable/c/1039bffd6ae9c75b42b7d148d6c1106134107b66>

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-2026-90303>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90303/>. Everything for agents: <https://agentprime.io/llms.txt>.