SB2026041571 - Anolis OS update for nginx

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2026-27651)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within the ngx_mail_auth_http_module module. A remote attacker can send specially crafted request to the server and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability requires that the CRAM-MD5 or APOP authentication is enabled, and the authentication server permits retry by returning the Auth-Wait response header.

2) Out-of-bounds write (CVE-ID: CVE-2026-32647)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error in the ngx_http_mp4_module module. A remote attacker can supply a specially crafted MP4 file to the server, trigger an out-of-bounds write and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://anas.openanolis.cn/errata/detail/ANSA-2026:0456