Vulnerability-Lookup

GHSA-M77G-747M-3XXC

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98131"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:44Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-m77g-747m-3xxc",
  "modified": "2026-09-25T12:31:37Z",
  "published": "2026-09-25T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98131"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a5d946466a95621fa2769720d59ea336003aa1a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e85adaac3dc6317cae902372c6849189ec62cf7d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98131 (GCVE-0-2026-98131)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:36 – Updated: 2026-09-25 10:36

Title

net: stmmac: fix dma mapping leak in stmmac_tso_xmit()

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/e85adaac3dc6317ca…
https://git.kernel.org/stable/c/a5d946466a95621fa…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f748be531d7012c456b97f66091d86b3675c5fef , < e85adaac3dc6317cae902372c6849189ec62cf7d (git) Affected: f748be531d7012c456b97f66091d86b3675c5fef , < a5d946466a95621fa2769720d59ea336003aa1a5 (git)
Linux	Linux	Affected: 4.7 Unaffected: 0 , < 4.7 (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e85adaac3dc6317cae902372c6849189ec62cf7d",
              "status": "affected",
              "version": "f748be531d7012c456b97f66091d86b3675c5fef",
              "versionType": "git"
            },
            {
              "lessThan": "a5d946466a95621fa2769720d59ea336003aa1a5",
              "status": "affected",
              "version": "f748be531d7012c456b97f66091d86b3675c5fef",
              "versionType": "git"
            }
          ]
        },
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/stmicro/stmmac/stmmac_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.7"
            },
            {
              "lessThan": "4.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc2",
                  "versionStartIncluding": "4.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
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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": "2026-09-25T10:36:11.043Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "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()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98131",
    "datePublished": "2026-09-25T10:36:11.043Z",
    "dateReserved": "2026-09-25T10:25:14.318Z",
    "dateUpdated": "2026-09-25T10:36:11.043Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-M77G-747M-3XXC

CVE-2026-98131 (GCVE-0-2026-98131)

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