CVE-2025-39891 (GCVE-0-2025-39891)

Vulnerability from cvelistv5 – Published: 2025-10-01 07:42 – Updated: 2026-05-11 21:38
VLAI
Title
wifi: mwifiex: Initialize the chan_stats array to zero
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Initialize the chan_stats array to zero The adapter->chan_stats[] array is initialized in mwifiex_init_channel_scan_gap() with vmalloc(), which doesn't zero out memory. The array is filled in mwifiex_update_chan_statistics() and then the user can query the data in mwifiex_cfg80211_dump_survey(). There are two potential issues here. What if the user calls mwifiex_cfg80211_dump_survey() before the data has been filled in. Also the mwifiex_update_chan_statistics() function doesn't necessarily initialize the whole array. Since the array was not initialized at the start that could result in an information leak. Also this array is pretty small. It's a maximum of 900 bytes so it's more appropriate to use kcalloc() instead vmalloc().
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 05daef0442d28350a1a0d6d0e2cab4a7a91df475 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < acdf26a912190fc6746e2a890d7d0338190527b4 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 32c124c9c03aa755cbaf60ef7f76afd918d47659 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 9df29aa5637d94d24f7c5f054ef4feaa7b766111 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 06616410a3e5e6cd1de5b7cbc668f1a7edeedad9 (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 5285b7009dc1e09d5bb9e05fae82e1a807882dbc (git)
Affected: bf35443314acb43fa8a3f9f8046e14cbe178762b , < 0e20450829ca3c1dbc2db536391537c57a40fe0b (git)
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Linux Linux Affected: 3.19
Unaffected: 0 , < 3.19 (semver)
Unaffected: 5.4.299 , ≤ 5.4.* (semver)
Unaffected: 5.10.243 , ≤ 5.10.* (semver)
Unaffected: 5.15.192 , ≤ 5.15.* (semver)
Unaffected: 6.1.151 , ≤ 6.1.* (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nwifi: mwifiex: Inicializar el array chan_stats a cero\n\nEl array adapter-\u003echan_stats[] se inicializa en mwifiex_init_channel_scan_gap() con vmalloc(), que no pone a cero la memoria. El array se rellena en mwifiex_update_chan_statistics() y luego el usuario puede consultar los datos en mwifiex_cfg80211_dump_survey().\n\nHay dos problemas potenciales aqu\u00ed. \u00bfQu\u00e9 pasa si el usuario llama a mwifiex_cfg80211_dump_survey() antes de que los datos se hayan rellenado? Adem\u00e1s, la funci\u00f3n mwifiex_update_chan_statistics() no inicializa necesariamente todo el array. Dado que el array no se inicializ\u00f3 al principio, eso podr\u00eda resultar en una fuga de informaci\u00f3n.\n\nAdem\u00e1s, este array es bastante peque\u00f1o. Es un m\u00e1ximo de 900 bytes, por lo que es m\u00e1s apropiado usar kcalloc() en lugar de vmalloc()."
          }
        ],
        "id": "CVE-2025-39891",
        "lastModified": "2026-10-19T21:10:00.160",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-10-01T08:15:31.570",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/05daef0442d28350a1a0d6d0e2cab4a7a91df475"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/06616410a3e5e6cd1de5b7cbc668f1a7edeedad9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0e20450829ca3c1dbc2db536391537c57a40fe0b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/32c124c9c03aa755cbaf60ef7f76afd918d47659"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5285b7009dc1e09d5bb9e05fae82e1a807882dbc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9df29aa5637d94d24f7c5f054ef4feaa7b766111"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/acdf26a912190fc6746e2a890d7d0338190527b4"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:24:20+00:00",
      "cve": "CVE-2025-39891",
      "id": "CVE-2025-39891",
      "initial_release_date": "2025-10-01T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: mwifiex: Initialize the chan_stats array to zero",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39891.json",
      "version": "3"
    }
  }
}



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