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CVE-2026-52983: net: airoha: fix BQL imbalance in TX path

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: net: airoha: fix BQL imbalance in TX path Fix a possible BQL imbalance in airoha_dev_xmit(), where inflight packets are accounted only for the AIROHA_NUM_TX_RING netdev TX queues. The queue index is computed as: qid = skb_get_queue_mapping(skb) % ARRAY_SIZE(qdma->q_tx) txq = netdev_get_tx_queue(dev, qid); However, airoha_qdma_tx_napi_poll() accounts completions across all netdev TX queues (num_tx_queues), leading to inconsistent BQL accounting. Also reset all netdev TX queues in the ndo_stop callback.

Affected products

• Linux kernel: from 6.12.91 before 6.18.33; from 6.19 before 7.0.10; 7.1-rc1 — fixed in 6.18.33, 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 6.18.33, 7.0.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d9f5a118205da2683ffcec78b9347f1f01a820e
• https://git.kernel.org/stable/c/aaad53a55812acd2355c0e5478896381e78b0110
• https://git.kernel.org/stable/c/ded2694247a55a16d0ebbe2d6f9139305c21457a
• https://git.kernel.org/stable/c/fcd6a3bb48bb661876c2743e89f0a6567f5cea2c

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