SB2026091991 - Memory corruption in Linux kernel irqchip driver
Published: September 19, 2026
Security Bulletin ID
SB2026091991
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory corruption (CVE-ID: CVE-2026-90120)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.