CVE-2026-98585 (GCVE-0-2026-98585)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:18 – Updated: 2026-10-19 09:22
VLAI
Title
eth: fbnic: Avoid rounding zero ring sizes
Summary
In the Linux kernel, the following vulnerability has been resolved: eth: fbnic: Avoid rounding zero ring sizes roundup_pow_of_two() is undefined for zero. ethtool permits a zero ring size to reach the driver, where the minimum-size check should reject it. Leave zero unchanged while rounding nonzero ring sizes. The minimum-size check then rejects zero deterministically without changing the established behavior for other values.
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
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6cbf18a05c06090d867ef417a2a30b214d42d171 , < 92c9f2ea634d92adff5403d231ebeda683c5685a (git)
Affected: 6cbf18a05c06090d867ef417a2a30b214d42d171 , < 491aa3167ae02f219cb2d2de6f4196d28dca03be (git)
Affected: 6cbf18a05c06090d867ef417a2a30b214d42d171 , < 0160953d8eec75c3c55562158c46442ff1fd410b (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.55 , ≤ 6.18.* (semver)
Unaffected: 7.2.9 , ≤ 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/meta/fbnic/fbnic_ethtool.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "original_commit_for_fix"
            }
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      ],
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                },
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: Avoid rounding zero ring sizes\n\nroundup_pow_of_two() is undefined for zero. ethtool permits a zero ring\nsize to reach the driver, where the minimum-size check should reject it.\n\nLeave zero unchanged while rounding nonzero ring sizes. The minimum-size\ncheck then rejects zero deterministically without changing the established\nbehavior for other values."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:22:10.939Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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          "url": "https://git.kernel.org/stable/c/0160953d8eec75c3c55562158c46442ff1fd410b"
        }
      ],
      "title": "eth: fbnic: Avoid rounding zero ring sizes",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98585",
    "datePublished": "2026-10-18T15:18:58.018Z",
    "dateReserved": "2026-09-25T10:25:14.358Z",
    "dateUpdated": "2026-10-19T09:22:10.939Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "epss": "0.00166",
      "percentile": "0.05829"
    },
    "microsoft_vex": {
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      "cve": "CVE-2026-98585",
      "id": "msrc_CVE-2026-98585",
      "initial_release_date": "2026-10-20T22:24:06.000Z",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "eth: fbnic: Avoid rounding zero ring sizes",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98585.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
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                "vendor": "Linux",
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            ],
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: Avoid rounding zero ring sizes\n\nroundup_pow_of_two() is undefined for zero. ethtool permits a zero ring\nsize to reach the driver, where the minimum-size check should reject it.\n\nLeave zero unchanged while rounding nonzero ring sizes. The minimum-size\ncheck then rejects zero deterministically without changing the established\nbehavior for other values."
          }
        ],
        "id": "CVE-2026-98585",
        "lastModified": "2026-10-19T10:19:19.390",
        "metrics": {},
        "published": "2026-10-18T16:17:11.083",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0160953d8eec75c3c55562158c46442ff1fd410b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            "url": "https://git.kernel.org/stable/c/92c9f2ea634d92adff5403d231ebeda683c5685a"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-20T04:08:55+00:00",
      "cve": "CVE-2026-98585",
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      "product_status:known_not_affected": "277",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: eth: fbnic: Avoid rounding zero ring sizes",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98585.json",
      "version": "3"
    }
  }
}



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