CVE-2026-72194

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

State: Published
Severity: 9.8 Critical
Published: Aug 15, 2026
Updated: Oct 16, 2026
Reserved: Aug 9, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	82cae269cfa953032fbb8980a7d554d60fb00b17 to before 99031d4f63c785d2a985b6a4c64c4256f7117052Affected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before 65357a81f64cb3fbe13b4b937586755e4b3a072fAffected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before 96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34Affected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before 78612f478f9fadcec4f9b3b089970da67ffb47e9Affected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before 908c9243ba309997b73cbda3e4c563d0fb345ee9Affected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before fdf50c788e0991e42a187ff75479a0df7fb752f1Affected 82cae269cfa953032fbb8980a7d554d60fb00b17 to before 1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cdAffected
LinuxLinux	5.15Affected before 5.15Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

82cae269cfa953032fbb8980a7d554d60fb00b17 to before 99031d4f63c785d2a985b6a4c64c4256f7117052Affected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before 65357a81f64cb3fbe13b4b937586755e4b3a072fAffected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before 96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34Affected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before 78612f478f9fadcec4f9b3b089970da67ffb47e9Affected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before 908c9243ba309997b73cbda3e4c563d0fb345ee9Affected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before fdf50c788e0991e42a187ff75479a0df7fb752f1Affected
82cae269cfa953032fbb8980a7d554d60fb00b17 to before 1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cdAffected

LinuxLinux

5.15Affected
before 5.15Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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