Advisory [CVE-2026-63859] Add missing bits in airoha_qdma_cleanup_tx_queue
This security Red Hat Linux advisory covers CVE-2026-63859.
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Summary
In the Linux kernel, the following vulnerability has been resolved: net: airoha: Add missing bits in airoha_qdma_cleanup_tx_queue() Similar to airoha_qdma_cleanup_rx_queue(), reset DMA TX descriptors in airoha_qdma_cleanup_tx_queue routine. Moreover, reset TX_DMA_IDX to TX_CPU_IDX to notify the NIC the QDMA TX ring is empty.
A flaw was found in the Linux kernel's airoha network driver. The `airoha_qdma_cleanup_tx_queue()` routine, responsible for cleaning up transmit queues, was missing critical steps.
This omission could lead to improper resetting of Direct Memory Access (DMA) transmit descriptors and incorrect notification to the network interface controller (NIC) about the state of the transmit ring. Consequently, this could result in resource mismanagement within the network driver.
Red Hat severity: not rated. Weakness: CWE-459.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Hardened Images as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 7 days ago·verify at source
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