Bug 2509211

Summary: CVE-2026-14266 7zip: 7-Zip: Remote Code Execution via XZ decompression heap-based buffer overflow [fedora-all]
Product: [Fedora] Fedora Reporter: Marian Rehak <mrehak>
Component: 7zipAssignee: Michel Lind <michel>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: davide, michel
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["dff56fd7-6fb6-4d6a-aea4-330d9648c265"]}
Fixed In Version: 7zip-26.02-1.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-04 13:58:20 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2443911, 2508503    

Description Marian Rehak 2026-07-30 08:23:55 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.

7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. 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 processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.
Comment 1 Michel Lind 2026-08-04 13:58:20 UTC 
This bug is already fixed in a published Bodhi update: 7zip-26.02-1.fc45
Comment 2 Michel Lind 2026-08-04 13:58:25 UTC 
This bug is already fixed in a published Bodhi update.