misc: sgi-gru: remove interrupt-context page-table walks
CVE-2026-90383 · published 17 Sept 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-90383?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 142586409c8be7dc071bb94d7cd2d69ccfd99b6b to < 5a540ced720b4397306337cab34af1af4b30827c, 142586409c8be7dc071bb94d7cd2d69ccfd99b6b to < 877423f595b60f8fe7c18b64a5d283d9e1732a13, 142586409c8be7dc071bb94d7cd2d69ccfd99b6b to < 6248eb1833ff0adfdbbadd5f846c2f22e02a01b0, 142586409c8be7dc071bb94d7cd2d69ccfd99b6b to < ef81e4a1628ecfb9cfc442de10883f383faf17a1
- Linux Linux: 2.6.27
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
misc: sgi-gru: remove interrupt-context page-table walks
The GRU TLB miss handler walks a process's page tables without holding
page-table locks or a reference to the mapped page. It also uses a kernel
page-table accessor on user page tables and supports only PMD-level large
mappings on x86-64.
Remove the direct walker. Send interrupt faults directly to user polling
mode so the existing call-OS fallback retries them in process context.
Remove the mmap-lock failure statistic that can no longer be incremented.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/5a540ced720b4397306337cab34af1af4b30827c
- git.kernel.org/stable/c/877423f595b60f8fe7c18b64a5d283d9e1732a13
- git.kernel.org/stable/c/6248eb1833ff0adfdbbadd5f846c2f22e02a01b0
- git.kernel.org/stable/c/ef81e4a1628ecfb9cfc442de10883f383faf17a1
- git.kernel.org/stable/c/928a8e9f523df845fc496bcb9811013b67aabec5
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON