CVE-2023-53315
- Published: 2025-09-16T17:15:37.480
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath11k: Fix SKB corruption in REO destination ring
While running traffics for a long time, randomly an RX descriptor
filled with value “0” from REO destination ring is received.
This descriptor which is invalid causes the wrong SKB (SKB stored in
the IDR lookup with buffer id “0”) to be fetched which in turn
causes SKB memory corruption issue and the same leads to crash
after some time.
Changed the start id for idr allocation to “1” and the buffer id “0”
is reserved for error validation. Introduced Sanity check to validate
the descriptor, before processing the SKB.
Crash Signature :
Unable to handle kernel paging request at virtual address 3f004900
PC points to “b15_dma_inv_range+0x30/0x50”
LR points to “dma_cache_maint_page+0x8c/0x128”.
The Backtrace obtained is as follows:
[] (b15_dma_inv_range) from [] (dma_cache_maint_page+0x8c/0x128)
[] (dma_cache_maint_page) from [] (__dma_page_dev_to_cpu+0x28/0xcc)
[] (__dma_page_dev_to_cpu) from [] (ath11k_dp_process_rx+0x1e8/0x4a4 [ath11k])
[] (ath11k_dp_process_rx [ath11k]) from [] (ath11k_dp_service_srng+0xb0/0x2ac [ath11k])
[] (ath11k_dp_service_srng [ath11k]) from [] (ath11k_pci_ext_grp_napi_poll+0x1c/0x78 [ath11k_pci])
[] (ath11k_pci_ext_grp_napi_poll [ath11k_pci]) from [] (__napi_poll+0x28/0xb8)
[] (__napi_poll) from [] (net_rx_action+0xf0/0x280)
[] (net_rx_action) from [] (__do_softirq+0xd0/0x280)
[] (__do_softirq) from [] (irq_exit+0x74/0xd4)
[] (irq_exit) from [] (__handle_domain_irq+0x90/0xb4)
[] (__handle_domain_irq) from [] (gic_handle_irq+0x58/0x90)
[] (gic_handle_irq) from [] (__irq_svc+0x58/0x8c)
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
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How to fix CVE-2023-53315
Description: In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: Fix SKB corruption in REO destination ring While running traffics for a long time, randomly an RX descriptor filled with value “0” from REO destination ring is received. This descriptor which is invalid causes the wrong SKB (SKB stored in the IDR lookup […]
Exploit Difficulty: HARD
⏱️ Time to exploit: > 4 hours
🛠️ Required skills: Advanced security expertise
💰 Public exploits: Rare or not public
How to Fix:
- Check if you're running the affected product
- Update to the latest patched version
- If patching is not immediately possible: restrict network exposure, apply least-privilege access
- Test the fix in a staging environment first
- Review logs for signs of exploitation
- Monitor for IOCs (Indicators of Compromise)
- Enable automatic security updates
- Set up vulnerability monitoring
- Review and harden security configurations
Exploit Difficulty Assessment
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