SB2025052990 - SUSE update for dnsdist

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2025-30193)

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

The vulnerability exists due to insufficient validation of incoming TCP connections from the client. A remote attacker can initiate a crafted TCP exchange and perform a denial of service (DoS) attack through stack exhaustion.

2) Double free (CVE-ID: CVE-2025-30194)

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

The vulnerability exists due to a double free error when DNSdist is configured to provide DoH via the nghttp2 provider. A remote attacker can initiate a crafted DoH exchange that triggers an illegal memory access and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://www.suse.com/support/update/announcement/2025/suse-su-202501743-1/