What’s Vulnerable › Vulnerabilities

CVE-2026-90351: wifi: mt76: mt7996: do not attach hif2 WED when the main WED attach failed

• 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: 2026-09-17 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: do not attach hif2 WED when the main WED attach failed If the WED attach for the primary PCIe function fails, the probe path still attached wed_hif2 for the secondary function, leaving the device in an inconsistent half-WED configuration that crashes later. The hif2 call also re-enabled hwrro_mode, which the failed primary attach had just turned off. Skip the hif2 WED setup when the primary WED device is not active.

Affected products

• Linux kernel: 6.8 — 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/76144da3c6184c7850631ad79d0600ac8bf7649a
• https://git.kernel.org/stable/c/7c1924332e986019c6bcddf55c843361cccac73f
• https://git.kernel.org/stable/c/9d1fd637336588d8118c104a025eca1341d9ec85
• https://git.kernel.org/stable/c/d566387df8306257d2f703a0d99fd9896400317e

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