CVE-2016-1886 is an integer signedness error in the genkbd_commonioctl function within FreeBSD's kernel, affecting versions 9.3, 10.1, 10.2, and 10.3. This vulnerability allows a local attacker to trigger a "two-way heap and stack overflow" by providing a negative value in the flen structure member during a SETFKEY ioctl call. With a CVSS score of 7.8 (High), the vulnerability presents a low attack complexity and can lead to sensitive information disclosure, denial of service (kernel crash), or privilege escalation. While not listed on the KEV catalog or Hot List, a Proof-of-Concept exploit is publicly available on ExploitDB, and it has received limited community discussion and media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
9.3CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:9.3:*:*:*:*:*:*:* | ||
10.1CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:10.1:*:*:*:*:*:*:* | ||
10.2CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:10.2:*:*:*:*:*:*:* | ||
10.3CPE matchmatch criteria | cpe:2.3:o:freebsd:freebsd:10.3:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.