{"id":"CVE-2026-74623","state":"PUBLISHED","title":"net: atlantic: free stranded TX buffers on ring deinit","description":"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.","publishedAt":"2026-08-22T15:32:06.467Z","updatedAt":"2026-08-23T12:47:48.573Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"a14ceebd13bf857bfca052bc5a6bd49e737912be","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"4f1c20873f70b4b22ef86dc38dad1fda8e169bcd","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"307d80193b4a4a75b8dc4e0d3162be3755abbed7","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"3447641d361dcc5511841d986ad4d849b2900d9b","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"b13202d401e1a20fec89b0cda733dcbaf279f79d","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"dd633280de7fdfd60dc4fcf63d04e2ad95b43269","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"452636ea5410a96e02ebaaf80b21e3620b98e0dd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/aquantia/atlantic/aq_ring.c","drivers/net/ethernet/aquantia/atlantic/aq_ring.h","drivers/net/ethernet/aquantia/atlantic/aq_vec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.266","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.217","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/aquantia/atlantic/aq_ring.c","drivers/net/ethernet/aquantia/atlantic/aq_ring.h","drivers/net/ethernet/aquantia/atlantic/aq_vec.c"]}],"references":["https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be","https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd","https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7","https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c","https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b","https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d","https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269","https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74623.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74623","state":"PUBLISHED","datePublished":"2026-08-22T15:32:06.467Z","dateUpdated":"2026-08-23T12:47:48.573Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.921Z"},"containers":{"cna":{"title":"net: atlantic: free stranded TX buffers on ring deinit","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"a14ceebd13bf857bfca052bc5a6bd49e737912be","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"4f1c20873f70b4b22ef86dc38dad1fda8e169bcd","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"307d80193b4a4a75b8dc4e0d3162be3755abbed7","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"3447641d361dcc5511841d986ad4d849b2900d9b","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"b13202d401e1a20fec89b0cda733dcbaf279f79d","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"dd633280de7fdfd60dc4fcf63d04e2ad95b43269","versionType":"git"},{"version":"eb36bedf28be6d986bdbcfa375bab08ffa45efd8","status":"affected","lessThan":"452636ea5410a96e02ebaaf80b21e3620b98e0dd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/aquantia/atlantic/aq_ring.c","drivers/net/ethernet/aquantia/atlantic/aq_ring.h","drivers/net/ethernet/aquantia/atlantic/aq_vec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"5.10.266","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.217","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/aquantia/atlantic/aq_ring.c","drivers/net/ethernet/aquantia/atlantic/aq_ring.h","drivers/net/ethernet/aquantia/atlantic/aq_vec.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be"},{"url":"https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"},{"url":"https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7"},{"url":"https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"},{"url":"https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b"},{"url":"https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d"},{"url":"https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269"},{"url":"https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-23T12:47:48.573Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.10.266"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}