Vulnerability-Lookup

GHSA-5F42-C4X2-RX63

Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-18 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference

During XSK TX queue teardown, outstanding descriptors are completed without a CQE. If one requested a TX timestamp, the completion path passes that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences it.

Return zero when no CQE is available, indicating that teardown did not produce a TX timestamp.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98791"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference\n\nDuring XSK TX queue teardown, outstanding descriptors are completed\nwithout a CQE. If one requested a TX timestamp, the completion path\npasses that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences\nit.\n\nReturn zero when no CQE is available, indicating that teardown did not\nproduce a TX timestamp.",
  "id": "GHSA-5f42-c4x2-rx63",
  "modified": "2026-10-18T18:32:03Z",
  "published": "2026-10-18T18:32:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98791"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63df0ef4c6e3105589e6bb2e758ce611b0ada86c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f81d40e2eb69552334f510114f3e6edd0d43178b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fce70b6bf9f3261e887419a4e7caa25b80fa9d55"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98791 (GCVE-0-2026-98791)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:48 – Updated: 2026-10-19 09:25

Title

net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference

Summary

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference During XSK TX queue teardown, outstanding descriptors are completed without a CQE. If one requested a TX timestamp, the completion path passes that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences it. Return zero when no CQE is available, indicating that teardown did not produce a TX timestamp.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6820 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/fce70b6bf9f3261e8…
https://git.kernel.org/stable/c/f81d40e2eb6955233…
https://git.kernel.org/stable/c/63df0ef4c6e310558…
https://git.kernel.org/stable/c/7b97273cbebe9dd4f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ec706a860eba99bf934d59f74b5db90af44e882e , < fce70b6bf9f3261e887419a4e7caa25b80fa9d55 (git) Affected: ec706a860eba99bf934d59f74b5db90af44e882e , < f81d40e2eb69552334f510114f3e6edd0d43178b (git) Affected: ec706a860eba99bf934d59f74b5db90af44e882e , < 63df0ef4c6e3105589e6bb2e758ce611b0ada86c (git) Affected: ec706a860eba99bf934d59f74b5db90af44e882e , < 7b97273cbebe9dd4fddc457f0c4f2a124d0e3996 (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.113 , ≤ 6.12.* (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fce70b6bf9f3261e887419a4e7caa25b80fa9d55",
              "status": "affected",
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "versionType": "git"
            },
            {
              "lessThan": "f81d40e2eb69552334f510114f3e6edd0d43178b",
              "status": "affected",
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "versionType": "git"
            },
            {
              "lessThan": "63df0ef4c6e3105589e6bb2e758ce611b0ada86c",
              "status": "affected",
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
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            },
            {
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              "status": "affected",
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.8"
            },
            {
              "lessThan": "6.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.113",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "6.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                },
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference\n\nDuring XSK TX queue teardown, outstanding descriptors are completed\nwithout a CQE. If one requested a TX timestamp, the completion path\npasses that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences\nit.\n\nReturn zero when no CQE is available, indicating that teardown did not\nproduce a TX timestamp."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:25:44.148Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98791",
    "datePublished": "2026-10-18T15:48:30.080Z",
    "dateReserved": "2026-09-25T10:25:14.370Z",
    "dateUpdated": "2026-10-19T09:25:44.148Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

Vulnerability timeline

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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.
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