CVE-2026-74622
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware.
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
Description
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware. Since the page reuse strategy was added, a cleaned RX buffer keeps its page (and its DMA mapping) in the ring for reuse, and refill is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES slots are free. Slots that were consumed but not yet reposted therefore sit in the complementary [sw_tail, sw_head) gap with a live page, and the deinit walk never visits them: up to a refill batch worth of pages and DMA mappings leak on every interface down. Walk the whole ring instead and release whatever is still there. Also bail out if the buffer ring is already gone: a partial aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so aq_ptp_ring_deinit() still gets here on the unwind path.
- CVSS
- Not yet scored
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac
- https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770
- https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439
- https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b
- https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe
- https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b
- https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a
- https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.