CVE-2026-98791

Full vulnerability record from the local CVENow database.

Description

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

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-10-18 16:17:33.087000

Last modified

2026-10-19 10:19:43.137000

View original CVE JSON

{
  "id": "CVE-2026-98791",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-18T16:17:33.087",
  "lastModified": "2026-10-19T10:19:43.137",
  "vulnStatus": "Received",
  "cveTags": [],
  "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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "lessThan": "fce70b6bf9f3261e887419a4e7caa25b80fa9d55",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "lessThan": "f81d40e2eb69552334f510114f3e6edd0d43178b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "lessThan": "63df0ef4c6e3105589e6bb2e758ce611b0ada86c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "ec706a860eba99bf934d59f74b5db90af44e882e",
              "lessThan": "7b97273cbebe9dd4fddc457f0c4f2a124d0e3996",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.8",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.8",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.56",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.10",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/63df0ef4c6e3105589e6bb2e758ce611b0ada86c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f81d40e2eb69552334f510114f3e6edd0d43178b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/fce70b6bf9f3261e887419a4e7caa25b80fa9d55",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}