CVE-2026-49975

Publication date 3 June 2026

Last updated 6 June 2026

Ubuntu priority

Why this priority?

Description

HTTP/2 Bomb denial of service issue

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	26.04 LTS resolute	Fixed 2.4.66-2ubuntu2.2
	25.10 questing	Fixed 2.4.64-1ubuntu3.5
	24.04 LTS noble	Fixed 2.4.58-1ubuntu8.13
	22.04 LTS jammy	Fixed 2.4.52-1ubuntu4.21
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation
nginx	26.04 LTS resolute	Needs evaluation
	25.10 questing	Needs evaluation
	24.04 LTS noble	Needs evaluation
	22.04 LTS jammy	Needs evaluation
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Notes

mdeslaur

nginx fixed this by releasing 1.29.8 with a max_headers directive with a default of 1000. They did not mention this release on their security page, and did not assign an nginx specific CVE to this issue.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
apache2	Upstream: 35c6e40 Upstream: 47d3100
nginx	Upstream: 3656941

References

Related Ubuntu Security Notices (USN)

USN-8384-1
Apache HTTP Server vulnerability
4 June 2026