vulnerability
Alma Linux: CVE-2021-23017: Important: nginx:1.18 security update (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Jun 1, 2021 | May 4, 2022 | Apr 20, 2026 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Jun 1, 2021
Added
May 4, 2022
Modified
Apr 20, 2026
Description
A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.
Solutions
alma-upgrade-nginxalma-upgrade-nginx-all-modulesalma-upgrade-nginx-filesystemalma-upgrade-nginx-mod-http-image-filteralma-upgrade-nginx-mod-http-perlalma-upgrade-nginx-mod-http-xslt-filteralma-upgrade-nginx-mod-mailalma-upgrade-nginx-mod-stream
References
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.