CVE-2026-27784

Publication date 24 March 2026

Last updated 6 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
nginx	26.04 LTS resolute	Not affected
	25.10 questing	Fixed 1.28.0-6ubuntu1.2
	24.04 LTS noble	Fixed 1.24.0-2ubuntu7.7
	22.04 LTS jammy	Fixed 1.18.0-6ubuntu14.10
	20.04 LTS focal	Fixed 1.18.0-0ubuntu1.7+esm1
	18.04 LTS bionic	Fixed 1.14.0-0ubuntu1.11+esm2
	16.04 LTS xenial	Fixed 1.10.3-0ubuntu0.16.04.5+esm7
	14.04 LTS trusty	Fixed 1.4.6-1ubuntu3.9+esm6

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Patch details

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

Package	Patch details
nginx	Upstream: b23ac73

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-8375-1
nginx vulnerabilities
3 June 2026