CVE•Published 2026-08-19•Modified 2026-09-01•1 article on news•5 live references•NVD data
CVE-2026-49422Freebsd · Freebsd
Vulnerability data via NVD (ingested)
CVSS v3.1
8.4
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
3
Exploit Prediction Scoring System · top 97% of all CVEs
Weaknesses (CWE)
Description
The RACK setsockopt(2) handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace switches stacks twice during this window, the check will succeed but the saved pointer will refer to freed memory. The bug may be exploitable by an unprivileged local user to escalate privileges.
Timeline
Published 2026-08-19
Modified 2026-09-01
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 tag193 hosts
vuln:CVE-2026-49422Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Freebsd"Hosts Shodan identified as running Freebsd.
More intel sources (5)
Shodan report
vuln:CVE-2026-49422Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-49422Censys host search filtered to this CVE id.
grep.app
CVE-2026-49422Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-49422GitHub code search for direct mentions.
Google dork
"CVE-2026-49422" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-49422 on GitHub.