CVE-2025-71266 - fs: ntfs3: check return value of indx_find to avoid infinite loop

CVE-2025-71266 - fs: ntfs3: check return value of indx_find to avoid infinite loop

https://cvefeed.io/rssfeed/latest.atom / Wed, 03/18/2026 - 14:07
CVE ID :CVE-2025-71266
Published : March 18, 2026, 11:16 a.m. | 1 hour, 44 minutes ago
Description :In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: check return value of indx_find to avoid infinite loop We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed dentry in the ntfs3 filesystem can cause the kernel to hang during the lookup operations. By setting the HAS_SUB_NODE flag in an INDEX_ENTRY within a directory's INDEX_ALLOCATION block and manipulating the VCN pointer, an attacker can cause the indx_find() function to repeatedly read the same block, allocating 4 KB of memory each time. The kernel lacks VCN loop detection and depth limits, causing memory exhaustion and an OOM crash. This patch adds a return value check for fnd_push() to prevent a memory exhaustion vulnerability caused by infinite loops. When the index exceeds the size of the fnd->nodes array, fnd_push() returns -EINVAL. The indx_find() function checks this return value and stops processing, preventing further memory allocation.
Severity: 0.0 | NA
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