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CVE-2022-50055: iavf: Fix adminq error handling

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: iavf: Fix adminq error handling iavf_alloc_asq_bufs/iavf_alloc_arq_bufs allocates with dma_alloc_coherent memory for VF mailbox. Free DMA regions for both ASQ and ARQ in case error happens during configuration of ASQ/ARQ registers. Without this change it is possible to see when unloading interface: 74626.583369: dma_debug_device_change: device driver has pending DMA allocations while released from device [count=32] One of leaked entries details: [device address=0x0000000b27ff9000] [size=4096 bytes] [mapped with DMA_BIDIRECTIONAL] [mapped as coherent]

Affected products

• Linux kernel: from 3.14 before 5.4.211; from 5.5 before 5.10.138; from 5.11 before 5.15.63; from 5.16 before 5.19.4; 6.0-rc1 — fixed in 5.10.138, 5.15.63, 5.19.4, 5.4.211

How to fix

Upgrade to a fixed version: Linux kernel 5.10.138, 5.15.63, 5.19.4, 5.4.211. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/35c63581fdefdcbaeae8cded18908523252353ad
• https://git.kernel.org/stable/c/419831617ed349992c84344dbd9e627f9e68f842
• https://git.kernel.org/stable/c/4fe80492d53971d9a49f39f3c86d2d67c6f3638a
• https://git.kernel.org/stable/c/dab6b551f5ba4c79a0dd4970dd8533c37a7b100f
• https://git.kernel.org/stable/c/ff289f2be5899efd0e897d2b434a78e36df2c69b

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