CVE-2016-1886: Freebsd

High severity, CVSS 7.8. EPSS: 1.1% chance of exploitation in the next 30 days.

Integer signedness error in the genkbd_commonioctl function in sys/dev/kbd/kbd.c in FreeBSD 9.3 before p42, 10.1 before p34, 10.2 before p17, and 10.3 before p3 allows local users to obtain sensitive information from kernel memory, cause a denial of service (memory overwrite and kernel crash), or gain privileges via a negative value in the flen structure member in the arg argument in a SETFKEY ioctl call, which triggers a "two way heap and stack overflow."

Affected products

• Freebsd Freebsd: version 9.3 only; version 10.1 only; version 10.2 only; version 10.3 only

Published 2016-05-25. Last modified 2026-06-17.