Out-of-bounds write in Linux kernel - CVE-2026-89904
Published: September 17, 2026
Vulnerability identifier: #VU150380
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89904
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to an out-of-bounds write in the acpi_package_ids[] array when processing a PPTT ACPI table on a LoongArch virtual machine. A remote attacker can trigger the array overflow to cause memory corruption.
The issue can occur on LoongArch virtual machines configured with one core per socket.
Affected software
Linux kernel
How to mitigate CVE-2026-89904
Install security update from vendor's repository.