What’s Vulnerable › Vulnerabilities

CVE-2026-90374: wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]

• 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: validate RX band_idx before dereferencing phys[] band_idx comes from a 2-bit descriptor field (0-3) and was used directly to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the result. A corrupt or reserved descriptor value could index out of bounds or hit a NULL phy on parts with fewer bands. Reject invalid band indices, mirroring mt7996_rx_get_wcid().

Affected products

• Linux kernel: 6.2 — 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/0f53ece876e1f3bbb3e18f48afc4af1ee967b16c
• https://git.kernel.org/stable/c/2243778a5fae8329ab5f18e7adcd7e03b911a1b7
• https://git.kernel.org/stable/c/493a029c205a994644327d554f0cfeb9651aba7c
• https://git.kernel.org/stable/c/535091c587268cc783608642838a655d828eefdd
• https://git.kernel.org/stable/c/b1c5cf8903bec5476a2233b4e45287b9a2213e02

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