FKIE_CVE-2026-74622

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: free RX pages of consumed but not refilled buffers aq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to hardware. Since the page reuse strategy was added, a cleaned RX buffer keeps its page (and its DMA mapping) in the ring for reuse, and refill is batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES slots are free. Slots that were consumed but not yet reposted therefore sit in the complementary [sw_tail, sw_head) gap with a live page, and the deinit walk never visits them: up to a refill batch worth of pages and DMA mappings leak on every interface down. Walk the whole ring instead and release whatever is still there. Also bail out if the buffer ring is already gone: a partial aq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so aq_ptp_ring_deinit() still gets here on the unwind path.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/aquantia/atlantic/aq_ring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1e58b0bab40dcbdfc04acaba6a221d40801c3770",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "30c473ea097ef0c93b064281b3e295c97d17e28b",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "ff451bc4290b79c04f1c5cfa928d448f9d47ecf5",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "64e1346bc66b947eb80b848e4c8d9828ba50e0fe",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "782cc40b7ade4614a8aec0b948b8cf95c69f8d4b",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "24d87dc28ddd3771dd0e88719209811809729439",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            },
            {
              "lessThan": "e8e7471ef686b6c002218fee9671cc61992ae01a",
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/aquantia/atlantic/aq_ring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "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 RX pages of consumed but not refilled buffers\n\naq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to\nhardware. Since the page reuse strategy was added, a cleaned RX buffer\nkeeps its page (and its DMA mapping) in the ring for reuse, and refill\nis batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES\nslots are free. Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\n\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind path."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: atlantic: liberar p\u00e1ginas RX de b\u00faferes consumidos pero no rellenados\n\naq_ring_rx_deinit() solo recorre [sw_head, sw_tail), la regi\u00f3n publicada al hardware. Desde que se a\u00f1adi\u00f3 la estrategia de reutilizaci\u00f3n de p\u00e1ginas, un b\u00fafer RX limpiado mantiene su p\u00e1gina (y su mapeo DMA) en el anillo para su reutilizaci\u00f3n, y el rellenado se realiza por lotes: aq_ring_rx_fill() retorna anticipadamente hasta que AQ_CFG_RX_REFILL_THRES ranuras est\u00e9n libres. Las ranuras que fueron consumidas pero a\u00fan no republicadas, por lo tanto, se encuentran en el hueco complementario [sw_tail, sw_head) con una p\u00e1gina activa, y el recorrido de desinicializaci\u00f3n nunca las visita: hasta un lote de rellenado de p\u00e1ginas y mapeos DMA se fugan en cada bajada de interfaz.\n\nRecorrer todo el anillo en su lugar y liberar lo que a\u00fan est\u00e9 all\u00ed. Tambi\u00e9n salir si el anillo de b\u00fafer ya no existe: un fallo parcial de aq_ptp_ring_alloc() libera el anillo pero deja aq_nic establecido, por lo que aq_ptp_ring_deinit() a\u00fan llega aqu\u00ed en la ruta de desenrollado."
    }
  ],
  "id": "CVE-2026-74622",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {},
  "published": "2026-08-22T16:16:35.027",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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