{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74623",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74623"
  ],
  "published": "2026-08-22T15:32:12Z",
  "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.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.183",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74623"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-23T12:46:35Z"
  }
}