CVE-2026-98131 (GCVE-0-2026-98131)
Vulnerability from cvelistv5
Published
2026-09-25 10:36
Modified
2026-10-21 12:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix dma mapping leak in stmmac_tso_xmit() In stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the frame is dropped but the DMA mappings already created for the linear part and for the fragments mapped before the failure are never unmapped, leaking DMA mappings. Fix the leak by walking back over the descriptors used by the frame and releasing each of them with stmmac_free_tx_buffer(). Moreover, release the descriptors with stmmac_release_tx_desc() unmapping the DMA buffers.
References
Impacted products
Vendor Product Version
Linux Linux Version: f748be531d7012c456b97f66091d86b3675c5fef
Version: f748be531d7012c456b97f66091d86b3675c5fef
Version: f748be531d7012c456b97f66091d86b3675c5fef
Version: f748be531d7012c456b97f66091d86b3675c5fef
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
              "versionType": "semver"
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      "cpeApplicability": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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: stmmac: fix dma mapping leak in stmmac_tso_xmit()\n\nIn stmmac_tso_xmit(), if the DMA mapping of an skb fragment fails, the\nframe is dropped but the DMA mappings already created for the linear\npart and for the fragments mapped before the failure are never\nunmapped, leaking DMA mappings.\n\nFix the leak by walking back over the descriptors used by the frame and\nreleasing each of them with stmmac_free_tx_buffer(). Moreover, release\nthe descriptors with stmmac_release_tx_desc() unmapping the DMA buffers."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:54:39.509Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/c5449b635362cb678d29d8f6ab54e65734d891ce"
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          "url": "https://git.kernel.org/stable/c/8a3257f142ae513d0c96d42f97386d4941bcec29"
        },
        {
          "url": "https://git.kernel.org/stable/c/e85adaac3dc6317cae902372c6849189ec62cf7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5d946466a95621fa2769720d59ea336003aa1a5"
        }
      ],
      "title": "net: stmmac: fix dma mapping leak in stmmac_tso_xmit()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98131",
    "datePublished": "2026-09-25T10:36:11.043Z",
    "dateReserved": "2026-09-25T10:25:14.318Z",
    "dateUpdated": "2026-10-21T12:54:39.509Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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