Bug 2547450 (CVE-2026-42617)

Summary: CVE-2026-42617 ntfs-3g: ntfs-3g: Privilege escalation via heap-based buffer overflow in ntfs_ir_to_ib()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in NTFS-3G. A heap-based buffer overflow occurs when expanding a directory on a specially crafted NTFS filesystem image, such as during file creation. A local attacker can exploit this vulnerability to corrupt memory within the privileged binary, potentially leading to arbitrary code execution and privilege escalation.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2547623, 2547624    
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Description OSIDB Bzimport 2026-10-07 14:12:11 UTC 
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ir_to_ib() in index.c that allows an attacker to corrupt heap memory in the SUID-root ntfs-3g binary by crafting a malicious NTFS image. The overflow is triggered by extending a directory, e.g., by creating a file.