CVE-2026-98422 (GCVE-0-2026-98422)
Vulnerability from cvelistv5
Published
2026-10-14 13:27
Modified
2026-10-19 09:19
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown On ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from the AP interface, but it's never decremented again unless the AP is also brought down. Thus, bringing the same AP_VLAN up again will increment the counter again and eventually hit the sanity check: WARN_ON_ONCE(sdata->crypto_tx_tailroom_needed_cnt != master->crypto_tx_tailroom_needed_cnt); Reset it on ifdown to avoid that.
References
Impacted products
Vendor Product Version
Linux Linux Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
Version: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/iface.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b0b32d3f163d24ea7134380666193bf398e9dc0b",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "f6b34a7d64324faf28eedc0f8678b0f832f1cc36",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "304a874670a0b6ab5589a7f60b4af0251797b121",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "7775759e3cb35ef5a571b2d877c2a9b70a5d5f08",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "3d76b45e8432c0d75fcb9e90d92eaa3176898adf",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "4b54d01b48445b66c9e576de92b90a3a3ae7b34a",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "875835377d8d62c849b4eb03a7abfafa71d7668f",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            },
            {
              "lessThan": "4504f3960dc4501c73be9f99eabda2e26e9db41e",
              "status": "affected",
              "version": "f9dca80b98caac8b4bfb43a2edf1e9f877ccf322",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/iface.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.8",
              "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": "5.10.271",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.54",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.8",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "4.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: reset the AP_VLAN tailroom counter on ifdown\n\nOn ifup, AP_VLAN interfaces get crypto_tx_tailroom_needed_cnt from\nthe AP interface, but it\u0027s never decremented again unless the AP is\nalso brought down. Thus, bringing the same AP_VLAN up again will\nincrement the counter again and eventually hit the sanity check:\n\n  WARN_ON_ONCE(sdata-\u003ecrypto_tx_tailroom_needed_cnt !=\n               master-\u003ecrypto_tx_tailroom_needed_cnt);\n\nReset it on ifdown to avoid that."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:19:15.873Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b"
        },
        {
          "url": "https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36"
        },
        {
          "url": "https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121"
        },
        {
          "url": "https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a"
        },
        {
          "url": "https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e"
        }
      ],
      "title": "wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98422",
    "datePublished": "2026-10-14T13:27:50.789Z",
    "dateReserved": "2026-09-25T10:25:14.348Z",
    "dateUpdated": "2026-10-19T09:19:15.873Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.