FKIE_CVE-2026-74623

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-23 13:16
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a14ceebd13bf857bfca052bc5a6bd49e737912be",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "4f1c20873f70b4b22ef86dc38dad1fda8e169bcd",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "307d80193b4a4a75b8dc4e0d3162be3755abbed7",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "3447641d361dcc5511841d986ad4d849b2900d9b",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "b13202d401e1a20fec89b0cda733dcbaf279f79d",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "dd633280de7fdfd60dc4fcf63d04e2ad95b43269",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            },
            {
              "lessThan": "452636ea5410a96e02ebaaf80b21e3620b98e0dd",
              "status": "affected",
              "version": "eb36bedf28be6d986bdbcfa375bab08ffa45efd8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "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"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.11"
            },
            {
              "lessThan": "4.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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\u0027s page_pool, so a single stranded frame keeps\nthe pool\u0027s 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."
    }
  ],
  "id": "CVE-2026-74623",
  "lastModified": "2026-08-23T13:16:47.317",
  "metrics": {},
  "published": "2026-08-22T16:16:35.157",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/307d80193b4a4a75b8dc4e0d3162be3755abbed7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3447641d361dcc5511841d986ad4d849b2900d9b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/452636ea5410a96e02ebaaf80b21e3620b98e0dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4f1c20873f70b4b22ef86dc38dad1fda8e169bcd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a14ceebd13bf857bfca052bc5a6bd49e737912be"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b13202d401e1a20fec89b0cda733dcbaf279f79d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd633280de7fdfd60dc4fcf63d04e2ad95b43269"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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