Answer in brief
CVE-2026-74623 records a Unknown severity vulnerability in net: atlantic: free stranded TX buffers on ring deinit. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <307d80193b4a4a75b8dc4e0d3162be3755abbed7 || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <3447641d361dcc5511841d986ad4d849b2900d9b || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <b13202d401e1a20fec89b0cda733dcbaf279f79d || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <dd633280de7fdfd60dc4fcf63d04e2ad95b43269 || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <452636ea5410a96e02ebaaf80b21e3620b98e0dd | 307d80193b4a4a75b8dc4e0d3162be3755abbed7, 7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c, 3447641d361dcc5511841d986ad4d849b2900d9b, b13202d401e1a20fec89b0cda733dcbaf279f79d, dd633280de7fdfd60dc4fcf63d04e2ad95b43269, 452636ea5410a96e02ebaaf80b21e3620b98e0dd |
| Linux/Linuxgeneric | 4.11 | Not reported |
| Linux/Linuxgeneric | >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <a14ceebd13bf857bfca052bc5a6bd49e737912be || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <4f1c20873f70b4b22ef86dc38dad1fda8e169bcd || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <307d80193b4a4a75b8dc4e0d3162be3755abbed7 || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <3447641d361dcc5511841d986ad4d849b2900d9b || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <b13202d401e1a20fec89b0cda733dcbaf279f79d || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <dd633280de7fdfd60dc4fcf63d04e2ad95b43269 || >=eb36bedf28be6d986bdbcfa375bab08ffa45efd8 <452636ea5410a96e02ebaaf80b21e3620b98e0dd | a14ceebd13bf857bfca052bc5a6bd49e737912be, 4f1c20873f70b4b22ef86dc38dad1fda8e169bcd, 307d80193b4a4a75b8dc4e0d3162be3755abbed7, 7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c, 3447641d361dcc5511841d986ad4d849b2900d9b, b13202d401e1a20fec89b0cda733dcbaf279f79d, dd633280de7fdfd60dc4fcf63d04e2ad95b43269, 452636ea5410a96e02ebaaf80b21e3620b98e0dd |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free stranded TX buffers on ring deinit aq_vec_deinit() drains the TX rings with a single aq_ring_tx_clean() call, which frees at most AQ_CFG_TX_CLEAN_BUDGET (256) descriptors and stops at hw_head, which no longer moves once aq_vec_stop() has stopped the hardware and NAPI. Completed descriptors beyond the budget and everything still posted in [hw_head, sw_tail) keep their skb or xdp_frame when the interface goes down: aq_vec_ring_free() then frees the buffer ring and the references are lost for good. Today this is a silent memory leak on every interface down under TX/XDP_TX load. With the conversion of the RX path to page_pool posted for net-next it becomes much more visible: XDP_TX frames carry fragment references on the RX ring's page_pool, so a single stranded frame keeps the pool's inflight count above zero forever. page_pool_destroy() then never completes, the pool is leaked together with its pages, and "page_pool_release_retry() stalled pool shutdown" is warned every 60 seconds from that point on, on every ifdown, XDP detach or ring resize under XDP_TX load. Bring back aq_ring_tx_deinit() as it was before the removal and use it for teardown again, with one extension: TX rings can hold xdp_frames nowadays, so release those too. They are returned with xdp_return_frame() since this runs in process context.
Quoted source text, attributed separately from HOL analysis.