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CVE-2026-74622

Estado: RecibidaSin puntuar—

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.

Leer descripción completaMostrar menos

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.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-74622",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "1e58b0bab40dcbdfc04acaba6a221d40801c3770",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "30c473ea097ef0c93b064281b3e295c97d17e28b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "ff451bc4290b79c04f1c5cfa928d448f9d47ecf5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "64e1346bc66b947eb80b848e4c8d9828ba50e0fe",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "782cc40b7ade4614a8aec0b948b8cf95c69f8d4b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "24d87dc28ddd3771dd0e88719209811809729439",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86",
              "lessThan": "e8e7471ef686b6c002218fee9671cc61992ae01a",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/aquantia/atlantic/aq_ring.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/aquantia/atlantic/aq_ring.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-22T16:16:35.027",
  "references": [
    {
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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."
    }
  ],
  "lastModified": "2026-08-22T16:16:35.027",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}