Bug 2547445 (CVE-2026-46572)

Summary: CVE-2026-46572 ntfs-3g: ntfs-3g: Privilege escalation via heap-based buffer overflow in ntfs_ib_cut_tail()
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. This vulnerability allows a local attacker to achieve privilege escalation or cause a denial of service (DoS) by corrupting system memory. By providing a specially crafted NTFS filesystem image and creating a file within a malicious directory, an attacker can trigger a heap-based buffer overflow in the directory indexing component. When ntfs-3g runs with elevated permissions (SUID-root), this memory corruption can be leveraged to execute arbitrary code with root privileges.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2547633, 2547634    
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Description OSIDB Bzimport 2026-10-07 14:01:51 UTC 
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ib_cut_tail() in libntfs-3g/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 creating a file in a specially crafted directory.