{"id":"CVE-2026-74623","summary":"net: atlantic: free stranded TX buffers on ring deinit","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: atlantic: free stranded TX buffers on ring deinit\n\naq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean()\ncall, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and\nstops at hw_head, which no longer moves once aq_vec_stop() has stopped\nthe hardware and NAPI. Completed descriptors beyond the budget and\neverything still posted in [hw_head, sw_tail) keep their skb or\nxdp_frame when the interface goes down: aq_vec_ring_free() then frees\nthe buffer ring and the references are lost for good.\n\nToday this is a silent memory leak on every interface down under\nTX/XDP_TX load. With the conversion of the RX path to page_pool posted\nfor net-next it becomes much more visible: XDP_TX frames carry fragment\nreferences on the RX ring's page_pool, so a single stranded frame keeps\nthe pool's inflight count above zero forever. page_pool_destroy() then\nnever completes, the pool is leaked together with its pages, and\n\"page_pool_release_retry() stalled pool shutdown\" is warned every 60\nseconds from that point on, on every ifdown, XDP detach or ring resize\nunder XDP_TX load.\n\nBring back aq_ring_tx_deinit() as it was before the removal and use it\nfor teardown again, with one extension: TX rings can hold xdp_frames\nnowadays, so release those too. They are returned with\nxdp_return_frame() since this runs in process context.","modified":"2026-08-25T03:30:09.069419045Z","published":"2026-08-22T15:32:06.467Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74623.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74623.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74623"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8"},{"fixed":"a14ceebd13bf857bfca052bc5a6bd49e737912be"},{"fixed":"4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"},{"fixed":"307d80193b4a4a75b8dc4e0d3162be3755abbed7"},{"fixed":"7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"},{"fixed":"3447641d361dcc5511841d986ad4d849b2900d9b"},{"fixed":"b13202d401e1a20fec89b0cda733dcbaf279f79d"},{"fixed":"dd633280de7fdfd60dc4fcf63d04e2ad95b43269"},{"fixed":"452636ea5410a96e02ebaaf80b21e3620b98e0dd"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74623.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.11.0"},{"fixed":"5.10.266"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.217"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74623.json"}}],"schema_version":"1.9.0"}