CVE-2026-74622net: atlantic: free RX pages of consumed but not refilled buffers
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 builds before 1e58b0bab40dcbdfc04acaba6a221d40801c3770; 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 builds before 30c473ea097ef0c93b064281b3e295c97d17e28b; 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 builds before 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac; from 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 before ff451bc4290b79c04f1c5cfa928d448f9d47ecf5; from 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 before 64e1346bc66b947eb80b848e4c8d9828ba50e0fe; from 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 before 782cc40b7ade4614a8aec0b948b8cf95c69f8d4b; 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 builds before 24d87dc28ddd3771dd0e88719209811809729439; from 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 before e8e7471ef686b6c002218fee9671cc61992ae01a | CNA record |
References
- https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770
- https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b
- https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac
- https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5
- https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe
- https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b
- https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439
- https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.