CVE•Published 2026-04-30•Modified 2026-05-01•1 article on news•6 live references•NVD data
CVE-2026-42512Freebsd · Freebsd
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
8
Exploit Prediction Scoring System · top 92% of all CVEs
Weaknesses (CWE)
Description
As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.
Timeline
Published 2026-04-30
Modified 2026-05-01
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag267 hosts
vuln:CVE-2026-42512Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Freebsd"Hosts Shodan identified as running Freebsd.
More intel sources (5)
Shodan report
vuln:CVE-2026-42512Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42512Censys host search filtered to this CVE id.
grep.app
CVE-2026-42512Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42512GitHub code search for direct mentions.
Google dork
"CVE-2026-42512" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42512 on GitHub.