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.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jun 25, 2026 |
| Ubuntu | — | Upgrade linux-image-azure-7.0Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-aws-64kUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-realtime-hwe-26.04Upgrade linux-image-virtual-7.0Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-realtime-64kUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-realtimeUpgrade linux-image-gcpUpgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-oem-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-raspi-7.0Upgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-azureUpgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-generic-64k-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-virtualUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-generic-7.0Upgrade linux-image-7.0.0-31-genericUpgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-oem-26.04Upgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-gke-7.0Upgrade linux-image-7.0.0-1013-oemUpgrade linux-image-oracleUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-azure-lts-26.04Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-1012-awsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-oem-26.04bUpgrade linux-image-generic-64kUpgrade linux-image-oem-26.04aUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-raspiUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-nvidia-7.0Upgrade linux-image-gke-64kUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-realtime-7.0Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-genericUpgrade linux-image-aws-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-gke-64k-7.0Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-aws-64k-7.0Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-nvidia-bosUpgrade linux-image-ibmUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-gkeUpgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-gcp-64kUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-nvidia | Sep 14, 2026 | Sep 7, 2026 |
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