# misc: sgi-gru: remove interrupt-context page-table walks

CVE record · `CVE-2026-90383`

- **Identifiers:** `CVE-2026-90383`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:09 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: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before 0ca505b973aa1a5e3fcca7bd04774e794ff5e662` (git)
  - affected: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before 5a540ced720b4397306337cab34af1af4b30827c` (git)
  - affected: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before 877423f595b60f8fe7c18b64a5d283d9e1732a13` (git)
  - affected: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before 6248eb1833ff0adfdbbadd5f846c2f22e02a01b0` (git)
  - affected: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before ef81e4a1628ecfb9cfc442de10883f383faf17a1` (git)
  - affected: `142586409c8be7dc071bb94d7cd2d69ccfd99b6b to before 928a8e9f523df845fc496bcb9811013b67aabec5` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `2.6.27`
  - unaffected: `before 2.6.27` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 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

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel's sgi-gru driver is affected from 2.6.27 until fixed. Its TLB miss handler walked user page tables without page-table locks or page references, but the source gives few details on what an attacker needs or what impact results. Upgrade to 6.1.191, 6.6.160, 6.12.110, 6.18.52, or a later release in those series.

Written 12 Nov 2026.

## 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90383](https://www.cve.org/CVERecord?id=CVE-2026-90383)
- [NVD: CVE-2026-90383](https://nvd.nist.gov/vuln/detail/CVE-2026-90383)

### References from the CNA

- <https://git.kernel.org/stable/c/0ca505b973aa1a5e3fcca7bd04774e794ff5e662>
- <https://git.kernel.org/stable/c/5a540ced720b4397306337cab34af1af4b30827c>
- <https://git.kernel.org/stable/c/877423f595b60f8fe7c18b64a5d283d9e1732a13>
- <https://git.kernel.org/stable/c/6248eb1833ff0adfdbbadd5f846c2f22e02a01b0>
- <https://git.kernel.org/stable/c/ef81e4a1628ecfb9cfc442de10883f383faf17a1>
- <https://git.kernel.org/stable/c/928a8e9f523df845fc496bcb9811013b67aabec5>

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-2026-90383>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90383/>. Everything for agents: <https://agentprime.io/llms.txt>.