Bug 2493729 (CVE-2026-53298)

Summary: CVE-2026-53298 kernel: net: airoha: Move ndesc initialization at end of airoha_qdma_init_rx_queue()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's airoha network driver. An issue with early initialization of the ndesc variable in the airoha_qdma_init_rx_queue() routine can lead to a NULL pointer dereference during cleanup. This can result in a Denial of Service (DoS) condition. Additionally, improper ordering of page pool allocation could lead to memory leaks.
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Description OSIDB Bzimport 2026-06-26 21:03:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: airoha: Move ndesc initialization at end of airoha_qdma_init_rx_queue()

If queue entry or DMA descriptor list allocation fails in
airoha_qdma_init_rx_queue routine, airoha_qdma_cleanup() will trigger a
NULL pointer dereference running netif_napi_del() for RX queue NAPIs
since netif_napi_add() has never been executed to this particular RX NAPI.
The issue is due to the early ndesc initialization in
airoha_qdma_init_rx_queue() since airoha_qdma_cleanup() relies on ndesc
value to check if the queue is properly initialized. Fix the issue moving
ndesc initialization at end of airoha_qdma_init_tx routine.
Move page_pool allocation after descriptor list allocation in order to
avoid memory leaks if desc allocation fails.
Comment 1 Mauro Matteo Cascella 2026-06-29 09:37:48 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062618-CVE-2026-53298-7ff5@gregkh/T