Bug 2494762

Summary: CVE-2026-14164 rpi-imager: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack() [fedora-all]
Product: [Fedora] Fedora Reporter: TEJ RATHI <trathi>
Component: rpi-imagerAssignee: Felix Wang <topazus>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 45CC: nixuser, topazus
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["ce213b8a-43fa-4d87-9c7a-ae9c06fbf5b5"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2493411    

Description TEJ RATHI 2026-06-30 06:24:07 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.

A double-free vulnerability exists in the libarchive RAR5 reader subsystem within archive_read_support_format_rar5.c where the state tracking pointer rar->cstate.filtered_buf can be linked to a temporary filter output block during archive decompression. When the unpacking engine subsequently processes an adjacent file or resets its internal state layout via init_unpack(), it releases the allocation mapped to filtered_buf but fails to clear or nullify the underlying pointer variable. A specially crafted RAR5 archive can exploit this lingering dangling pointer by forcing a secondary release operation on the exact same memory address, triggering a standard memory-manager abort that immediately crashes the application and results in a Denial of Service (DoS).
Comment 1 Aoife Moloney 2026-08-17 15:06:27 UTC 
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.