CVE-2023-6603

Publication date 31 December 2024

Last updated 21 October 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A flaw was found in FFmpeg's HLS playlist parsing. This vulnerability allows a denial of service via a maliciously crafted HLS playlist that triggers a null pointer dereference during initialization.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libav	25.10 questing	Not in release
	25.04 plucky	Not in release
	24.10 oracular	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	14.04 LTS trusty	Needs evaluation
ffmpeg	25.10 questing	Vulnerable
	25.04 plucky	Vulnerable
	24.10 oracular	Ignored end of life, was deferred [2025-06-02]
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Fixed 7:4.4.2-0ubuntu0.22.04.1+esm10
	20.04 LTS focal	Fixed 7:4.2.7-0ubuntu0.1+esm11
	18.04 LTS bionic	Fixed 7:3.4.11-0ubuntu0.1+esm11
	16.04 LTS xenial	Vulnerable

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Notes

bruce-cable

As of 2025-06-02 no patch available

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-7830-1
FFmpeg vulnerabilities
21 October 2025