CVE-2024-34161

A flaw was found in the nginx HTTP/3 implementation. If the network infrastructure supports a Maximum Transmission Unit (MTU) of 4096 or greater without fragmentation, undisclosed QUIC packets can trigger a use-after-free condition, causing worker processes to leak previously freed memory.

This flaw allows an attacker to cause a memory leak. However, the leaked memory is random, can't be controlled by the attacker, and does not include nginx configuration or private keys. For these reasons, this flaw has been rated with a Moderate severity.

The nginx package as shipped in Red Hat Enterprise Linux 8, 9 and RHSCL is not affected by this vulnerability because the support for HTTP/3 is not enabled and the vulnerable code was introduced in a later version of nginx.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.