Buffer overflow in Freebsd
CVE-2016-1886
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."
Vulnerability class: Buffer Overflow
EPSS: 0.011 (63.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Freebsd — versions 9.3, 10.1, 10.2
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (vdb-entry, x_refsource_SECTRACK)
- cve@mitre.org (vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_FREEBSD, vendor-advisory, Vendor Advisory)
- cve@mitre.org (x_refsource_CONFIRM, Patch)
- cve@mitre.org (Exploit, x_refsource_MISC)
Frequently asked questions
- What is CVE-2016-1886?
- CVE-2016-1886 is a high-severity vulnerability in Freebsd, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2016-05-25.
- How severe is CVE-2016-1886?
- High severity. CVSS v3 base score is 7.8 out of 10.