CVE-2024-34161: NGINX HTTP/3 QUIC vulnerability

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-29 · updated 2026-06-17
Weakness: CWE-416

Description

When NGINX Plus or NGINX OSS are configured to use the HTTP/3 QUIC module and the network infrastructure supports a Maximum Transmission Unit (MTU) of 4096 or greater without fragmentation, undisclosed QUIC packets can cause NGINX worker processes to leak previously freed memory.

Affected products

F5 NGINX Open Source: from 1.25.0 before 1.26.1 — fixed in 1.26.1
F5 NGINX Plus: r30, r30-p1, r30-p2, r31, r31-p1
Fedoraproject Fedora: 39, 40

How to fix

Upgrade to a fixed version: F5 NGINX Open Source 1.26.1. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2024/05/30/4
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLAOKJWDALQZBIV3WKGPJ6T5Z56D3PRD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7RPLWC35WHEUFCGKNFG62ESNID25TEZ/
https://my.f5.com/manage/s/article/K000139627
http://www.openwall.com/lists/oss-security/2024/05/30/4
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLAOKJWDALQZBIV3WKGPJ6T5Z56D3PRD/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7RPLWC35WHEUFCGKNFG62ESNID25TEZ/
https://my.f5.com/manage/s/article/K000139627

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