What’s Vulnerable › Vulnerabilities

CVE-2026-98620: net: ethernet: mtk_eth_soc: unregister net_devices in case of probe failure

• Severity: unknown
• 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: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: mtk_eth_soc: unregister net_devices in case of probe failure If register_netdev() fails for one of the MTK_MAX_DEVS devices in mtk_probe(), the error path jumps to err_deinit_ppe, skipping mtk_unreg_dev(). The previously registered net_devices are then freed by mtk_free_dev() while still in NETREG_REGISTERED state, hitting the BUG_ON(dev->reg_state != NETREG_UNREGISTERED). Route the register_netdev() failure to err_unreg_netdev so the net_devices registered so far are properly unregistered before being freed.

Affected products

• Linux kernel: 4.9 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fdb944d4df02223c67d5e65c4c134ecb57a5668
• https://git.kernel.org/stable/c/245bea0c7ab278150c70366bdeb69b901327133c
• https://git.kernel.org/stable/c/310d1ac61a4d5a2ca8356a3a48d263acf54503ce
• https://git.kernel.org/stable/c/7254b702e556158e34b4d7c168b5d8e7da5978af
• https://git.kernel.org/stable/c/ab3bde3b3e56331b4f53a1f6cf4e5e9d1c14c1a0

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