net: atlantic: free RX pages of consumed but not refilled buffers

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Summary

CVECVE-2026-74622
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:35 UTC
Updated2026-08-22 16:16:35 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 1e58b0bab40dcbdfc04acaba6a221d40801c3770 git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 30c473ea097ef0c93b064281b3e295c97d17e28b git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 ff451bc4290b79c04f1c5cfa928d448f9d47ecf5 git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 64e1346bc66b947eb80b848e4c8d9828ba50e0fe git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 782cc40b7ade4614a8aec0b948b8cf95c69f8d4b git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 24d87dc28ddd3771dd0e88719209811809729439 git Not specified
CNA Linux Linux affected 46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86 e8e7471ef686b6c002218fee9671cc61992ae01a git Not specified
CNA Linux Linux affected 5.2 Not specified
CNA Linux Linux unaffected 5.2 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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