CVE-2026-98272 (GCVE-0-2026-98272)
Vulnerability from cvelistv5
Published
2026-10-06 08:45
Modified
2026-10-19 09:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: prevent buffer overflow in page_pool allocation The per‑processor buffering scheme is supported only if the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS (8). This is already checked in mvpp2_probe() during the initial activation of percpu_pools. However, mvpp2_change_mtu() may later call mvpp2_bm_switch_buffers(priv, true) without this check, which can lead to an out-of-bounds access in the priv->page_pool array in mvpp2_bm_init(). The array is sized to hold MVPP2_PORT_MAX_RXQ entries, and mvpp2_get_nrxqs() may return exactly that value. The per-CPU scheme then doubles it to nrxqs * 2, exceeding the array bounds. Check that the hardware version is MVPP22 or newer and that the number of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS before switching to per-CPU mode. Found by Linux Verification Center (linuxtesting.org) with SVACE.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
Version: 7d04b0b13b1175ce0c4bdc77f1278c1f120f874f
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{
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.4"
            },
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              "version": "0",
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            },
            {
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              "version": "5.15.222",
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              "version": "6.1.189",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              ],
              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mvpp2: prevent buffer overflow in page_pool allocation\n\nThe per\u2011processor buffering scheme is supported only if the\nnumber of pools (nrxqs\u202f*\u202f2) does not exceed MVPP2_BM_MAX_POOLS (8).\nThis is already checked in mvpp2_probe() during the initial\nactivation of percpu_pools.\n\nHowever, mvpp2_change_mtu() may later call\nmvpp2_bm_switch_buffers(priv, true) without this check, which can\nlead to an out-of-bounds access in the priv-\u003epage_pool array in\nmvpp2_bm_init(). The array is sized to hold MVPP2_PORT_MAX_RXQ\nentries, and mvpp2_get_nrxqs() may return exactly that value. The\nper-CPU scheme then doubles it to nrxqs * 2, exceeding the array\nbounds.\n\nCheck that the hardware version is MVPP22 or newer and that the\nnumber of pools (nrxqs * 2) does not exceed MVPP2_BM_MAX_POOLS\nbefore switching to per-CPU mode.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:16:44.017Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5cefdb7acfc646fbded59ae77dfe0aac4c9e4a3c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ac1d5adc4f4dbafbfd270b55cc6d8bf9849d545"
        },
        {
          "url": "https://git.kernel.org/stable/c/dfd46b5584a5881b131008767950e1ab82713c8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/6569fd85b0ef9a8a6f20b7eb868420b8c7c0c2a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7f30dcfa6c64033bf9137362517bd248e5be384"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0e7d62c1eb984dd204095118973c59604144cd8"
        },
        {
          "url": "https://git.kernel.org/stable/c/1734c3fc0066e228ce1c11e434b7c2527f0a949a"
        },
        {
          "url": "https://git.kernel.org/stable/c/14cb1e7702e5cb3c58888f6aed498381a73927d2"
        }
      ],
      "title": "net: mvpp2: prevent buffer overflow in page_pool allocation",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98272",
    "datePublished": "2026-10-06T08:45:33.974Z",
    "dateReserved": "2026-09-25T10:25:14.333Z",
    "dateUpdated": "2026-10-19T09:16:44.017Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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