CVE-2022-50762 fs/ntfs3: Avoid UBSAN error on true_sectors_per_clst()

Not scored Published 24 Dec 2025 Updated 23 May 2026

A local attacker can trigger a shift-out-of-bounds error in the Linux kernel NTFS3 driver, causing a system crash or denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2022-50762?

CVE-2022-50762 is a vulnerability in Linux, published on 24 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

fs/ntfs3: Avoid UBSAN error on true_sectors_per_clst()

syzbot reported UBSAN error as below:

[ 76.901829][ T6677] ================================================================================ [ 76.903908][ T6677] UBSAN: shift-out-of-bounds in fs/ntfs3/super.c:675:13 [ 76.905363][ T6677] shift exponent -247 is negative

This patch avoid this error.

Which versions are affected by CVE-2022-50762?

How do I fix CVE-2022-50762?

Apply the vendor's patch.

Is CVE-2022-50762 being exploited?

There is no known exploitation of CVE-2022-50762 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-50762, GHSA-v749-pfxc-qfwj, UBUNTU-CVE-2022-50762.