misc: sgi-gru: remove interrupt-context page-table walks (CVE-2026-90383) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90383

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

Answer in brief

CVE-2026-90383 records a Unknown severity vulnerability in misc: sgi-gru: remove interrupt-context page-table walks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=142586409c8be7dc071bb94d7cd2d69ccfd99b6b <877423f595b60f8fe7c18b64a5d283d9e1732a13 \|\| >=142586409c8be7dc071bb94d7cd2d69ccfd99b6b <6248eb1833ff0adfdbbadd5f846c2f22e02a01b0 \|\| >=142586409c8be7dc071bb94d7cd2d69ccfd99b6b <ef81e4a1628ecfb9cfc442de10883f383faf17a1 \|\| >=142586409c8be7dc071bb94d7cd2d69ccfd99b6b <928a8e9f523df845fc496bcb9811013b67aabec5	877423f595b60f8fe7c18b64a5d283d9e1732a13, 6248eb1833ff0adfdbbadd5f846c2f22e02a01b0, ef81e4a1628ecfb9cfc442de10883f383faf17a1, 928a8e9f523df845fc496bcb9811013b67aabec5
Linux/Linuxgeneric	2.6.27	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 877423f595b60f8fe7c18b64a5d283d9e1732a13 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.