Wind River Support Network

HomeDefectsLIN1021-22004

Acknowledged

LIN1021-22004 : Security Advisory - nginx - CVE-2026-28753

Created: Mar 25, 2026 Updated: Apr 20, 2026

Found In Version: 10.21.20.2

Severity: Standard

Applicable for: Wind River Linux LTS 21

Component/s: Userspace

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_module module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to potential request manipulation. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.