CVE-2016-4557 is a high-severity vulnerability affecting the Linux kernel before version 4.5.5, specifically within the BPF verifier. It stems from improper maintenance of an fd data structure, leading to a use-after-free condition. This flaw allows local users to escalate privileges or cause a denial of service through crafted BPF instructions. The vulnerability has a CVSS score of 7.8 (High) and a FAUCET Risk Score of 97/100, indicating a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. While not listed on the KEV catalog, exploit intelligence confirms the existence of public exploit code, including Metasploit modules and ExploitDB entries, demonstrating its exploitability. Despite the availability of exploits, there is minimal community discussion or media coverage surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.4, < 4.4.11CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
>= 4.5, < 4.5.5CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/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.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.