Vulnerability-Lookup

GHSA-7FQ6-P34M-GV65

Vulnerability from github – Published: 2026-10-14 15:32 – Updated: 2026-10-14 15:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98422"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-14T14:17:53Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-7fq6-p34m-gv65",
  "modified": "2026-10-14T15:32:21Z",
  "published": "2026-10-14T15:32:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98422"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/304a874670a0b6ab5589a7f60b4af0251797b121"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d76b45e8432c0d75fcb9e90d92eaa3176898adf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4504f3960dc4501c73be9f99eabda2e26e9db41e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b54d01b48445b66c9e576de92b90a3a3ae7b34a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7775759e3cb35ef5a571b2d877c2a9b70a5d5f08"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/875835377d8d62c849b4eb03a7abfafa71d7668f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0b32d3f163d24ea7134380666193bf398e9dc0b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6b34a7d64324faf28eedc0f8678b0f832f1cc36"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98422 (GCVE-0-2026-98422)

Vulnerability from cvelistv5 – Published: 2026-10-14 13:27 – Updated: 2026-10-14 13:27

Title

wifi: mac80211: reset the AP_VLAN tailroom counter on ifdown

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.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6667 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/b0b32d3f163d24ea7…
https://git.kernel.org/stable/c/f6b34a7d64324faf2…
https://git.kernel.org/stable/c/304a874670a0b6ab5…
https://git.kernel.org/stable/c/7775759e3cb35ef5a…
https://git.kernel.org/stable/c/3d76b45e8432c0d75…
https://git.kernel.org/stable/c/4b54d01b48445b66c…
https://git.kernel.org/stable/c/875835377d8d62c84…
https://git.kernel.org/stable/c/4504f3960dc4501c7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < b0b32d3f163d24ea7134380666193bf398e9dc0b (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < f6b34a7d64324faf28eedc0f8678b0f832f1cc36 (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 304a874670a0b6ab5589a7f60b4af0251797b121 (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 7775759e3cb35ef5a571b2d877c2a9b70a5d5f08 (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 3d76b45e8432c0d75fcb9e90d92eaa3176898adf (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 4b54d01b48445b66c9e576de92b90a3a3ae7b34a (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 875835377d8d62c849b4eb03a7abfafa71d7668f (git) Affected: f9dca80b98caac8b4bfb43a2edf1e9f877ccf322 , < 4504f3960dc4501c73be9f99eabda2e26e9db41e (git)
Linux	Linux	Affected: 4.1 Unaffected: 0 , < 4.1 (semver) Unaffected: 5.10.271 , ≤ 5.10.* (semver) Unaffected: 5.15.222 , ≤ 5.15.* (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.54 , ≤ 6.18.* (semver) Unaffected: 7.2.8 , ≤ 7.2.* (semver) Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "net/mac80211/iface.c"
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          "versions": [
            {
              "status": "affected",
              "version": "4.1"
            },
            {
              "lessThan": "4.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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              "versionType": "semver"
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
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              "versionType": "semver"
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              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
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              "versionType": "semver"
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        }
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        {
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}

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

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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