CVEvulnerability
CVE-2026-64228
5.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-24
- Last modified
- 2026-08-13
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-476
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.
Affected configurations
• linux linux kernel (>= 6.16 < 6.18.34)
• linux linux kernel (>= 6.19 < 7.0.11)
• linux linux kernel 7.1
Related
Weakness · CWE (1)
- CWE-476 NULL Pointer Dereference weakness