CVE-2026-74324

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7925: validate skb length in testmode query

In mt7925_tm_query(), the response skb from mt76_mcu_send_and_get_msg() is used in a memcpy without validating its length:

memcpy(evt_resp, skb->data + 8, MT7925_EVT_RSP_LEN);

where MT7925_EVT_RSP_LEN is 512. If the firmware returns a response shorter than 520 bytes (8 + 512), this reads beyond the skb data buffer. The over-read data is then returned to userspace via nla_put() in mt7925_testmode_dump().

Add a length check before the memcpy to ensure the skb contains sufficient data.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/c386e90a7ce8ddec9f038e9437661a2821b0ce89
• https://git.kernel.org/stable/c/e8b214b6d6e1902025452db0a0af73dc9693e4ba
• https://git.kernel.org/stable/c/c7369a00860a0704461d440e7c3bf9b49bfdbaee

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