CVE-2026-74623 (GCVE-0-2026-74623)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-23 12:47
VLAI
Title
net: atlantic: free stranded TX buffers on ring deinit
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.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6667 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < a14ceebd13bf857bfca052bc5a6bd49e737912be (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < 4f1c20873f70b4b22ef86dc38dad1fda8e169bcd (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < 307d80193b4a4a75b8dc4e0d3162be3755abbed7 (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < 7a3e1481f4ee6c581bccc6bfc6c970aac5be7b0c (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < 3447641d361dcc5511841d986ad4d849b2900d9b (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < b13202d401e1a20fec89b0cda733dcbaf279f79d (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < dd633280de7fdfd60dc4fcf63d04e2ad95b43269 (git)
Affected: eb36bedf28be6d986bdbcfa375bab08ffa45efd8 , < 452636ea5410a96e02ebaaf80b21e3620b98e0dd (git)
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Linux Linux Affected: 4.11
Unaffected: 0 , < 4.11 (semver)
Unaffected: 5.10.266 , ≤ 5.10.* (semver)
Unaffected: 5.15.217 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
          ],
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            "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",
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
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              "versionType": "semver"
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "*",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:47:48.573Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "net: atlantic: free stranded TX buffers on ring deinit",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74623",
    "datePublished": "2026-08-22T15:32:06.467Z",
    "dateReserved": "2026-08-15T05:44:03.921Z",
    "dateUpdated": "2026-08-23T12:47:48.573Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74623",
      "date": "2026-10-15",
      "epss": "0.00177",
      "percentile": "0.06743"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-25T02:02:26.000Z",
      "cve": "CVE-2026-74623",
      "id": "msrc_CVE-2026-74623",
      "initial_release_date": "2026-08-24T01:06:05.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net: atlantic: free stranded TX buffers on ring deinit",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74623.json",
      "version": "5"
    },
    "nvd": {
      "cve": {
        "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"
                ],
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                "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",
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                    "versionType": "semver"
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                    "status": "unaffected",
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                    "versionType": "semver"
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                    "versionType": "semver"
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            "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."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: atlantic: liberar b\u00faferes TX varados en la desinicializaci\u00f3n del anillo\n\naq_vec_deinit() vac\u00eda los anillos TX con una \u00fanica llamada a aq_ring_tx_clean(), que libera como m\u00e1ximo AQ_CFG_TX_CLEAN_BUDGET (256) descriptores y se detiene en hw_head, que ya no se mueve una vez que aq_vec_stop() ha detenido el hardware y NAPI. Los descriptores completados m\u00e1s all\u00e1 del presupuesto y todo lo que a\u00fan est\u00e1 publicado en [hw_head, sw_tail) conservan su skb o xdp_frame cuando la interfaz se desactiva: aq_vec_ring_free() luego libera el anillo de b\u00faferes y las referencias se pierden para siempre.\n\nHoy esto es una fuga de memoria silenciosa en cada desactivaci\u00f3n de interfaz bajo carga de TX/XDP_TX. Con la conversi\u00f3n de la ruta RX a page_pool publicada para net-next se vuelve mucho m\u00e1s visible: los frames XDP_TX llevan referencias de fragmentos en el page_pool del anillo RX, por lo que un \u00fanico frame varado mantiene el contador \u0027inflight\u0027 del pool por encima de cero para siempre. page_pool_destroy() entonces nunca se completa, el pool se fuga junto con sus p\u00e1ginas, y se advierte \u0027page_pool_release_retry() stalled pool shutdown\u0027 cada 60 segundos a partir de ese momento, en cada ifdown, desvinculaci\u00f3n de XDP o redimensionamiento de anillo bajo carga de XDP_TX.\n\nRecuperar aq_ring_tx_deinit() como estaba antes de su eliminaci\u00f3n y usarlo para el desmantelamiento de nuevo, con una extensi\u00f3n: los anillos TX pueden contener xdp_frames hoy en d\u00eda, as\u00ed que liberar esos tambi\u00e9n. Se devuelven con xdp_return_frame() ya que esto se ejecuta en contexto de proceso."
          }
        ],
        "id": "CVE-2026-74623",
        "lastModified": "2026-10-14T13:10:00.187",
        "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"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-24T14:48:36+00:00",
      "cve": "CVE-2026-74623",
      "id": "CVE-2026-74623",
      "initial_release_date": "2026-08-22T00:00:00+00:00",
      "product_status:known_affected": "260",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: atlantic: free stranded TX buffers on ring deinit",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74623.json",
      "version": "3"
    }
  }
}



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