Bug 2547454 (CVE-2026-46569)

Summary: CVE-2026-46569 ntfs-3g: ntfs-3g: Privilege escalation via heap-based buffer overflow in ntfs_ib_copy_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. A heap-based buffer overflow allows a local attacker to potentially achieve privilege escalation by supplying a specially crafted NTFS file system image. When extending a directory on the malicious image, such as by creating a file, memory within the privileged utility is corrupted, which can lead to arbitrary code execution with elevated root privileges or a denial of service (DoS).
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Bug Depends On: 2547627, 2547628    
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Description OSIDB Bzimport 2026-10-07 14:13:07 UTC 
In NTFS-3G before 2026.7.7, a heap buffer overflow exists in ntfs_ib_copy_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 extending a directory, e.g., by creating a file.