CVE-2026-53231
N/A
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | bad869b5e41a08424ff130fd6bb41b854be70095 < ef8d739eee6f85303cbecebc01eb72f063de74e0 | affected |
| Linux | Linux | bad869b5e41a08424ff130fd6bb41b854be70095 < 5a0082ec20a05ef2378410323a5089a8f1786f4a | affected |
| Linux | Linux | 7.0 | affected |
| Linux | Linux | 0 < 7.0 | unaffected |
| Linux | Linux | 7.0.13 <= 7.0.* | unaffected |
| Linux | Linux | 7.1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/ef8d739eee6f85303cbecebc01eb72f063de74e0
- https://git.kernel.org/stable/c/5a0082ec20a05ef2378410323a5089a8f1786f4a
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.