Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix RCU stall while reaping monitor destination ring While processing the monitor destination ring, MSDUs are reaped from the link descriptor based on the corresponding buf_id. However, sometimes the driver cannot obtain a valid buffer corresponding to the buf_id received from the hardware. This causes an infinite loop in the destination processing, resulting in a kernel crash. kernel log: ath11k_pci 0000:58:00.0: data msdu_pop: invalid buf_id 309 ath11k_pci 0000:58:00.0: data dp_rx_monitor_link_desc_return failed ath11k_pci 0000:58:00.0: data msdu_pop: invalid buf_id 309 ath11k_pci 0000:58:00.0: data dp_rx_monitor_link_desc_return failed Fix this by skipping the problematic buf_id and reaping the next entry, replacing the break with the next MSDU processing. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30 Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1

Affected versions

Linux: d5c65159f2895379e11ca13f62feabe93278985d through before cdb32923699932502b0573f818643aae72ce0cd5 (git); d5c65159f2895379e11ca13f62feabe93278985d through before 8db5de0cf02fccf4c759aa58edbe65659daf607c (git); d5c65159f2895379e11ca13f62feabe93278985d through before 9f1a002f0171d27f3554e529f3c70df438f05dfe (git); d5c65159f2895379e11ca13f62feabe93278985d through before b4991fc41745645f8050506f5a8578bd11e6b378 (git); d5c65159f2895379e11ca13f62feabe93278985d through before 16c6c35c03ea73054a1f6d3302a4ce4a331b427d (git); 5.6 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.