Bug 2571677

Summary: CVE-2026-124746 busybox: Out-of-bounds read in volume_id_get_buffer() via an offset+length wraparound [epel-all]
Product: [Fedora] Fedora EPEL Reporter: Vladimir Vasilev <vvasilev>
Component: busyboxAssignee: Tom "spot" Callaway <spotrh>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: epel10CC: admiller, davide, dvlasenk, epel-packagers-sig, spotrh, suraj.ghimire7
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["5aef1231-eca8-41d2-91fc-cee28283ce6e"]}
Fixed In Version: Doc Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2571675    

Description Vladimir Vasilev 2026-11-11 12:28:06 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 flaw was found in BusyBox's volume_id. In volume_id_get_buffer(), a 64-bit offset+length addition can wrap past 2^64, passing the buffer size check and returning a pointer far outside the buffer, which the NTFS prober dereferences, causing a SIGSEGV crash. A crafted filesystem image on an attached device triggers this when probed by blkid, findfs or mount LABEL=/UUID=, preventing those applets from resolving any device.