High · CVSS 8.4CVE-2026-89904

LoongArch: Fix acpi_package_ids[] array overflowCVE-2026-89904

Answer in brief

CVE-2026-89904 records a High severity (CVSS 8.4) vulnerability in LoongArch: Fix acpi_package_ids[] array overflow. 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 16, 2026Updated Oct 19, 2026Source checked Oct 31, 2026First seen by HOL Sep 16, 2026Material review Oct 19, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 8.4
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 8.4. 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	>=f18992be262d6515c94bf4bf6ce7598135076771 <0195e04b1eec8fb00e2db9c5e55655a3f5e76f60 \|\| >=4427a33faabb4b81511b99dfee18ce0a38b5b5df <d3fd094c13c6d0b74f246461ca4cf427d539c8e8 \|\| >=4e8f58620f6717f72f3d88a2c8f25c0c656d0ba7 <6311b8c471afa33c18adbe4eb16f862936b71ca3 \|\| >=4e8f58620f6717f72f3d88a2c8f25c0c656d0ba7 <2a2367d46d7a4ee4122b7a86e57125542dbbe963 \|\| 496bc868d9066e034787aa14b8ad6c23e77b51ef \|\| >=6.12.101 <6.12.110 \|\| >=6.18.42 <6.18.51 \|\| >=7.1.6 <7.2	0195e04b1eec8fb00e2db9c5e55655a3f5e76f60, d3fd094c13c6d0b74f246461ca4cf427d539c8e8, 6311b8c471afa33c18adbe4eb16f862936b71ca3, 2a2367d46d7a4ee4122b7a86e57125542dbbe963, 6.12.110, 6.18.51, 7.2
Linux/Linuxgeneric	7.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0195e04b1eec8fb00e2db9c5e55655a3f5e76f60 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Fix acpi_package_ids[] array overflow With LoongArch virt machine, a typical setting is one core per socket, there will max 256 sockets (packages) on one VM. With PPTT acpi table, array acpi_package_ids[] will be overflowed. Here change the array size of acpi_package_ids[] with the max value of MAX_PACKAGES and KVM_MAX_VCPUS.

Quoted source text, attributed separately from HOL analysis.