CVE-2026-89904

LoongArch: Fix acpi_package_ids[] array overflow

HIGH

8.4

CVSS Score

Published: September 16, 2026 at 10:32 AM UTC

Updated: October 19, 2026 at 09:18 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH8.4

Exploit prediction

EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

4427a33faabb4b81511b99dfee18ce0a38b5b5df496bc868d9066e034787aa14b8ad6c23e77b51ef4e8f58620f6717f72f3d88a2c8f25c0c656d0ba76.12.101 6.18.42 7.1.6 7.2f18992be262d6515c94bf4bf6ce7598135076771

Vendor states this is fixed in 0195e04b1eec8fb00e2db9c5e55655a3f5e76f60 (fixed)

Vendor states this is fixed in 2a2367d46d7a4ee4122b7a86e57125542dbbe963 (fixed)

Vendor states this is fixed in 6311b8c471afa33c18adbe4eb16f862936b71ca3 (fixed)

Vendor states this is fixed in d3fd094c13c6d0b74f246461ca4cf427d539c8e8 (fixed)

Vendor states this is fixed in 6.12.110 (unaffected)

Vendor states this is fixed in 6.18.51 (unaffected)

Vendor states this is fixed in 7.2 (unaffected)

Vendor states this is fixed in 7.2.5 (unaffected)

Vendor states this is fixed in 7.3 (unaffected)

Vendor states this is fixed in 7.3-rc1 (unaffected)