CVE-2026-89943 Linux Kernel - Undefined Behavior

Linux kernel contains an undefined behavior vulnerability caused by ignoring the return value of device_property_read_string() in loongson_card_parse_acpi(), letting kernel code use uninitialized pointers, exploit requires kernel interaction with ACPI properties.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.20% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Undefined Behavior
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix for ACPI property parsing in loongson.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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