CVE-2026-64228

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethtool: phy: avoid NULL deref when PHY driver is unbound phydev->drv can become NULL while the phy_device is still attached to its net_device, namely after the PHY driver is unbound via sysfs: echo <mdio_id> > /sys/bus/mdio_bus/drivers/<phy_drv>/unbind phy_remove() clears phydev->drv but doesn't call phy_detach(), so the phy_device stays in the link topology xarray and ethnl_req_get_phydev() still hands it back. ETHTOOL_MSG_PHY_GET then oopses on: rep_data->drvname = kstrdup(phydev->drv->name, GFP_KERNEL); drvname is already treated as optional by phy_reply_size(), phy_fill_reply() and phy_cleanup_data(), so just skip the allocation when there is no driver bound.

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Produits concernés

• Linux
• Linux linux kernel

Scores CVSS

Faiblesses (CWE)

• CWE-476

Références

• https://git.kernel.org/stable/c/17fe2381f967d353183f374a1c0181a6d194158c PatchMitigation
• https://git.kernel.org/stable/c/3586924625559e6f9876d726c80ff0a75f0d5849 Patch
• https://git.kernel.org/stable/c/e3adf69f8eb121a9128c2b0029efd050d3649153 Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories