CVE-2026-72194

Summary

In the Linux kernel, the following vulnerability has been resolved:

fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow

indx_find_buffer() recursively descends the B+ tree index with no depth limit. A crafted NTFS image with circular index node references causes unbounded recursion, overflowing the kernel stack and panicking the system.

This is reachable by mounting a malicious NTFS filesystem (e.g. from a USB drive via desktop automount) and deleting a file whose index entry triggers the rebalancing fallback path in indx_delete_entry().

Add a depth parameter and bail out with -EINVAL when it reaches the fnd->nodes array bound, matching the constraint already enforced by fnd_push() in indx_find().

The related function indx_find() was previously patched for a similar infinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was missed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 99031d4f63c785d2a985b6a4c64c4256f7117052affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 65357a81f64cb3fbe13b4b937586755e4b3a072faffected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 78612f478f9fadcec4f9b3b089970da67ffb47e9affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 908c9243ba309997b73cbda3e4c563d0fb345ee9affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < fdf50c788e0991e42a187ff75479a0df7fb752f1affected
LinuxLinux82cae269cfa953032fbb8980a7d554d60fb00b17 < 1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cdaffected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References