CVE-2026-56135
Description
A flaw was found in NTFS-3G. This vulnerability involves a heap-based buffer overflow, which occurs when the software attempts to write more data to a memory block than it can hold. An attacker can exploit this by creating a specially crafted NTFS image and then creating a file within a malicious directory. Successful exploitation could lead to corruption of heap memory in the SUID-root ntfs-3g binary, potentially allowing for unauthorized actions.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Mitigation
To mitigate this issue, avoid mounting untrusted NTFS filesystems. If `ntfs-3g` functionality is not required for unprivileged users, consider removing the SUID bit from the `ntfs-3g` binary to prevent unprivileged execution. This can be done with `sudo chmod u-s /usr/bin/ntfs-3g`. Note that this will prevent non-root users from mounting NTFS filesystems.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
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