Bug 2521085 - CVE-2026-18296 xdg-desktop-portal-cosmic: GStreamer: Remote Code Execution via MRF file parsing heap-based buffer overflow [fedora-all]
Summary: CVE-2026-18296 xdg-desktop-portal-cosmic: GStreamer: Remote Code Execution vi...
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Fedora
Classification: Fedora
Component: xdg-desktop-portal-cosmic
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Ryan Brue
QA Contact:
URL:
Whiteboard: {"flaws": ["e9026a13-ad9b-45f6-b66c-8...
Depends On: 2521084
Blocks: CVE-2026-18296
TreeView+ depends on / blocked
 
Reported: 2026-08-21 18:23 UTC by Vladimir Vasilev
Modified: 2026-08-27 13:07 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-08-27 13:07:29 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Vladimir Vasilev 2026-08-21 18:23:28 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

GStreamer MRF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of MRF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29608.

Comment 1 Fabio Valentini 2026-08-27 13:07:29 UTC
This is a bug in GStreamer itself, which this package only dynamically links to. Nothing can be done here.


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