Memory corruption in Linux kernel - CVE-2026-90120
Published: September 19, 2026
Vulnerability identifier: #VU151359
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90120
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause out-of-bounds memory corruption.
The vulnerability exists due to improper validation of the get_logical_index() return value in gic_acpi_parse_iaffid() when parsing MADT GICC entries. A local user can trigger parsing of a MADT GICC entry that does not correspond to a logical CPU recognized by the kernel to cause out-of-bounds memory corruption.
Affected software
Linux kernel
How to mitigate CVE-2026-90120
Install security update from vendor's repository.