Vulnerability feed

Executive summary

The advisory describes a Linux kernel fix for the mt76 mt7915 WiFi driver, which affects systems using MediaTek MT7915 and MT7916 wireless hardware. The advisory does not state a severity rating, and it describes the problem as warnings and system instability when the module is unloaded and reloaded. The fix is a kernel patch that disables receive NAPI processing when the device is removed.

Technical summary

The flaw is a resource-handling bug in the mt7915 driver: the driver destroys receive NAPI contexts without first disabling them, which triggers kernel warnings in __netif_napi_del_locked() and page_pool_disable_direct_recycling() when the mt7915e module is unloaded with an MT7916 device. The advisory states that the system generally becomes unstable after the module is reinserted. The patch adds a loop in mt7915_stop_hardware() that calls napi_disable() on each non-WED-RRO receive queue, and the advisory says the tx side is handled by the generic mt76 code. The advisory does not state a CVSS score, attack vector or required privileges, exploitation status, affected or fixed version numbers, or workarounds. Detection guidance is not stated.

Summaries are generated by AI from the linked advisory text. Confirm versions and fixes at the source.

Summarized from git.kernel.org/stable/c/0281dac1e213329…b02e612de7f1477a52d7

Score

No CVSS score published.

Affects

LinuxMediaTek, Inc.LinuxLinux kernelMediaTek, Inc. mt7915