CVE-2022-48754: phylib: fix potential use-after-free

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-06-20 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: phylib: fix potential use-after-free Commit bafbdd527d56 ("phylib: Add device reset GPIO support") added call to phy_device_reset(phydev) after the put_device() call in phy_detach(). The comment before the put_device() call says that the phydev might go away with put_device(). Fix potential use-after-free by calling phy_device_reset() before put_device().

Affected products

Linux kernel: from 4.16 before 4.19.228; from 4.20 before 5.4.176; from 5.5 before 5.10.96; from 5.11 before 5.15.19; from 5.16 before 5.16.5; 5.17-rc1 — fixed in 4.19.228, 5.10.96, 5.15.19, 5.16.5, 5.4.176

How to fix

Upgrade to a fixed version: Linux kernel 4.19.228, 5.10.96, 5.15.19, 5.16.5. Check the vendor advisory for mitigations.

References

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