NULL pointer dereference in CoreDNS - CVE-2026-62309
Published: July 10, 2026
Vulnerability identifier: #VU137313
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-62309
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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 28-byte UDP datagram when the proxyproto plugin is enabled. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Affected software
CoreDNS
How to mitigate CVE-2026-62309
Install updates from vendor's website.
CoreDNS - update to 1.14.5