CVE-2026-98338 (GCVE-0-2026-98338)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46
VLAI
Title
wifi: cfg80211: ibss: ref BSS entry for joined event
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: ibss: ref BSS entry for joined event When the IBSS is joined, we only record the BSSID/channel in the event and look up the BSS entry when processing it. However, that's racy, e.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a warning in the event work: !bss WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440 Workqueue: cfg80211 cfg80211_event_work cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144 cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179 cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393 Do the lookup early (the driver is expected to only join an IBSS that has a BSS entry) and keep a reference to it.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6618 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 667503ddcb96f3b10211f997fe55907fa7509841 , < b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b (git)
Affected: 667503ddcb96f3b10211f997fe55907fa7509841 , < 708f9d43d6a2eb9c6b83fe62af628de9dffd9314 (git)
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Linux Linux Affected: 2.6.32
Unaffected: 0 , < 2.6.32 (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/wireless/core.h",
            "net/wireless/ibss.c",
            "net/wireless/util.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b",
              "status": "affected",
              "version": "667503ddcb96f3b10211f997fe55907fa7509841",
              "versionType": "git"
            },
            {
              "lessThan": "708f9d43d6a2eb9c6b83fe62af628de9dffd9314",
              "status": "affected",
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              "versionType": "git"
            }
          ]
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            "net/wireless/ibss.c",
            "net/wireless/util.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.32"
            },
            {
              "lessThan": "2.6.32",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc4",
                  "versionStartIncluding": "2.6.32",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: ibss: ref BSS entry for joined event\n\nWhen the IBSS is joined, we only record the BSSID/channel in the event\nand look up the BSS entry when processing it. However, that\u0027s racy,\ne.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a\nwarning in the event work:\n\n  !bss\n  WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440\n  Workqueue: cfg80211 cfg80211_event_work\n   cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144\n   cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179\n   cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393\n\nDo the lookup early (the driver is expected to only join an IBSS that\nhas a BSS entry) and keep a reference to it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:46:29.213Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b"
        },
        {
          "url": "https://git.kernel.org/stable/c/708f9d43d6a2eb9c6b83fe62af628de9dffd9314"
        }
      ],
      "title": "wifi: cfg80211: ibss: ref BSS entry for joined event",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98338",
    "datePublished": "2026-10-06T08:46:29.213Z",
    "dateReserved": "2026-09-25T10:25:14.342Z",
    "dateUpdated": "2026-10-06T08:46:29.213Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-98338",
      "date": "2026-10-10",
      "epss": "0.00162",
      "percentile": "0.04909"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/wireless/core.h",
                  "net/wireless/ibss.c",
                  "net/wireless/util.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b",
                    "status": "affected",
                    "version": "667503ddcb96f3b10211f997fe55907fa7509841",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "708f9d43d6a2eb9c6b83fe62af628de9dffd9314",
                    "status": "affected",
                    "version": "667503ddcb96f3b10211f997fe55907fa7509841",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/wireless/core.h",
                  "net/wireless/ibss.c",
                  "net/wireless/util.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "2.6.32"
                  },
                  {
                    "lessThan": "2.6.32",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.8",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc4",
                    "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: cfg80211: ibss: ref BSS entry for joined event\n\nWhen the IBSS is joined, we only record the BSSID/channel in the event\nand look up the BSS entry when processing it. However, that\u0027s racy,\ne.g. a new scan with NL80211_SCAN_FLAG_FLUSH can remove it, causing a\nwarning in the event work:\n\n  !bss\n  WARNING: net/wireless/ibss.c:37 at __cfg80211_ibss_joined+0x3d3/0x440\n  Workqueue: cfg80211 cfg80211_event_work\n   cfg80211_process_wdev_events+0x39f/0x5b0 net/wireless/util.c:1144\n   cfg80211_process_rdev_events+0xa1/0x110 net/wireless/util.c:1179\n   cfg80211_event_work+0x2f/0x40 net/wireless/core.c:393\n\nDo the lookup early (the driver is expected to only join an IBSS that\nhas a BSS entry) and keep a reference to it."
          }
        ],
        "id": "CVE-2026-98338",
        "lastModified": "2026-10-06T09:18:26.437",
        "metrics": {},
        "published": "2026-10-06T09:18:26.437",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/708f9d43d6a2eb9c6b83fe62af628de9dffd9314"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b0e3f019e461ac42e45aa3ec1216cefaca2f4a8b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-10T11:32:23+00:00",
      "cve": "CVE-2026-98338",
      "id": "CVE-2026-98338",
      "initial_release_date": "2026-10-06T00:00:00+00:00",
      "product_status:known_affected": "277",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: cfg80211: ibss: ref BSS entry for joined event",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98338.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-07T23:45:17Z",
      "cve": "CVE-2026-98338",
      "id": "CVE-2026-98338",
      "initial_release_date": "2026-10-07T23:45:17Z",
      "product_status:known_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-98338",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98338.json",
      "version": "2"
    }
  }
}



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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.

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Nomenclature

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