Riskcovery

CVE-2026-53231

net: phy: don't try to setup PHY-driven SFP cages when using genphy

State
Published
Severity
Not scored
Published
Jun 25, 2026
Updated
Jun 25, 2026
Reserved
Jun 9, 2026

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: phy: don't try to setup PHY-driven SFP cages when using genphy

We don't have support for PHY-driver SFP cages with the genphy code.

On top of that, it was found by sashiko that running sfp_bus_add_upstream() for genphy deadlocks, as for genphy the PHY probing runs under RTNL, which isn't the case for non-genphy drivers.

This problem was reproduced, and does lead to a deadlock on RTNL.

Before the blamed commit, the phy_sfp_probe() call was made by individual PHY drivers, so there was no way to get to the SFP probing path when using genphy.

Let's therefore only run phy_sfp_probe when not using genphy.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • bad869b5e41a08424ff130fd6bb41b854be70095 to before ef8d739eee6f85303cbecebc01eb72f063de74e0Affected
  • bad869b5e41a08424ff130fd6bb41b854be70095 to before 5a0082ec20a05ef2378410323a5089a8f1786f4aAffected
LinuxLinux
  • 7.0Affected
  • before 7.0Not affected
  • 7.0.13 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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