CVE-2026-98830 (GCVE-0-2026-98830)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:49 – Updated: 2026-10-30 12:40
VLAI
Title
wifi: wfx: validate MIB read length before copying to caller
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: wfx: validate MIB read length before copying to caller wfx_hif_read_mib() copies reply->length bytes from the firmware response into the caller-provided buffer without checking that reply->length does not exceed val_len. A firmware response with a length field larger than expected overruns the caller buffer and reads past the end of the reply allocation. Replace the dead -ENOMEM check with an active validation that reply->length fits within val_len before the memcpy.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < b8310b55e53622a393d14af4939f620c1828778b (git)
Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < 819d4c1323e2a9b7329021d5367aa01add22b5dc (git)
Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < 02886c18a340da59df57365f29009e1258bfe333 (git)
Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < 71d140099165de03128c00dd129f1eab21c6a3c4 (git)
Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < 7acb36fd60a3e7b858f12e69a919c3609b281408 (git)
Affected: f95a29d40782f4f0052a692a822de3ba044b19ff , < ce67ebe9d8629776ce38e6995ae72fb903c828db (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (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)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/silabs/wfx/hif_tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b8310b55e53622a393d14af4939f620c1828778b",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            },
            {
              "lessThan": "819d4c1323e2a9b7329021d5367aa01add22b5dc",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            },
            {
              "lessThan": "02886c18a340da59df57365f29009e1258bfe333",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            },
            {
              "lessThan": "71d140099165de03128c00dd129f1eab21c6a3c4",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            },
            {
              "lessThan": "7acb36fd60a3e7b858f12e69a919c3609b281408",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            },
            {
              "lessThan": "ce67ebe9d8629776ce38e6995ae72fb903c828db",
              "status": "affected",
              "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/silabs/wfx/hif_tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "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": "6.1.191",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.113",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: validate MIB read length before copying to caller\n\nwfx_hif_read_mib() copies reply-\u003elength bytes from the firmware\nresponse into the caller-provided buffer without checking that\nreply-\u003elength does not exceed val_len. A firmware response with\na length field larger than expected overruns the caller buffer and\nreads past the end of the reply allocation.\n\nReplace the dead -ENOMEM check with an active validation that\nreply-\u003elength fits within val_len before the memcpy."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:40:02.347Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b8310b55e53622a393d14af4939f620c1828778b"
        },
        {
          "url": "https://git.kernel.org/stable/c/819d4c1323e2a9b7329021d5367aa01add22b5dc"
        },
        {
          "url": "https://git.kernel.org/stable/c/02886c18a340da59df57365f29009e1258bfe333"
        },
        {
          "url": "https://git.kernel.org/stable/c/71d140099165de03128c00dd129f1eab21c6a3c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/7acb36fd60a3e7b858f12e69a919c3609b281408"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce67ebe9d8629776ce38e6995ae72fb903c828db"
        }
      ],
      "title": "wifi: wfx: validate MIB read length before copying to caller",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98830",
    "datePublished": "2026-10-18T15:49:31.843Z",
    "dateReserved": "2026-09-25T10:25:14.372Z",
    "dateUpdated": "2026-10-30T12:40:02.347Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98830",
      "date": "2026-11-01",
      "epss": "0.00205",
      "percentile": "0.10566"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-28T01:48:11.000Z",
      "cve": "CVE-2026-98830",
      "id": "msrc_CVE-2026-98830",
      "initial_release_date": "2026-10-20T01:04:33.000Z",
      "product_status:known_not_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: wfx: validate MIB read length before copying to caller",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98830.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/silabs/wfx/hif_tx.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "b8310b55e53622a393d14af4939f620c1828778b",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "819d4c1323e2a9b7329021d5367aa01add22b5dc",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "02886c18a340da59df57365f29009e1258bfe333",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "71d140099165de03128c00dd129f1eab21c6a3c4",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7acb36fd60a3e7b858f12e69a919c3609b281408",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ce67ebe9d8629776ce38e6995ae72fb903c828db",
                    "status": "affected",
                    "version": "f95a29d40782f4f0052a692a822de3ba044b19ff",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/silabs/wfx/hif_tx.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.5"
                  },
                  {
                    "lessThan": "5.5",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.191",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.160",
                    "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"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: validate MIB read length before copying to caller\n\nwfx_hif_read_mib() copies reply-\u003elength bytes from the firmware\nresponse into the caller-provided buffer without checking that\nreply-\u003elength does not exceed val_len. A firmware response with\na length field larger than expected overruns the caller buffer and\nreads past the end of the reply allocation.\n\nReplace the dead -ENOMEM check with an active validation that\nreply-\u003elength fits within val_len before the memcpy."
          }
        ],
        "id": "CVE-2026-98830",
        "lastModified": "2026-10-30T13:21:29.410",
        "metrics": {},
        "published": "2026-10-18T16:17:37.250",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/02886c18a340da59df57365f29009e1258bfe333"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/71d140099165de03128c00dd129f1eab21c6a3c4"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/7acb36fd60a3e7b858f12e69a919c3609b281408"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/819d4c1323e2a9b7329021d5367aa01add22b5dc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b8310b55e53622a393d14af4939f620c1828778b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ce67ebe9d8629776ce38e6995ae72fb903c828db"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-21T01:25:12+00:00",
      "cve": "CVE-2026-98830",
      "id": "CVE-2026-98830",
      "initial_release_date": "2026-10-18T15:49:31.843000+00:00",
      "product_status:known_affected": "77",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: kernel: Denial of Service via buffer overflow in WFx Wi-Fi driver",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98830.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.