Vulnerability-Lookup

GHSA-W5GR-5834-37PM

Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31

Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: mesh: release the channel if start fails

ieee80211_join_mesh() acquires a channel context and then calls ieee80211_start_mesh(), which can fail. In that case, the chanctx isn't released then interface removal will attempt to unassign it after it's removed from the driver, hitting:

wlan0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx ieee80211_assign_link_chanctx __ieee80211_link_release_channel ieee80211_link_release_channel ieee80211_teardown_sdata unregister_netdevice_many_notify _cfg80211_unregister_wdev ieee80211_remove_interfaces ieee80211_unregister_hw mac80211_hwsim_del_radio hwsim_exit_net

Correctly release the channel on start failures.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98326"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-06T09:18:24Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: mesh: release the channel if start fails\n\nieee80211_join_mesh() acquires a channel context and then calls\nieee80211_start_mesh(), which can fail. In that case, the chanctx\nisn\u0027t released then interface removal will attempt to unassign it\nafter it\u0027s removed from the driver, hitting:\n\n  wlan0: Failed check-sdata-in-driver check, flags: 0x0\n  WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx\n   ieee80211_assign_link_chanctx\n   __ieee80211_link_release_channel\n   ieee80211_link_release_channel\n   ieee80211_teardown_sdata\n   unregister_netdevice_many_notify\n   _cfg80211_unregister_wdev\n   ieee80211_remove_interfaces\n   ieee80211_unregister_hw\n   mac80211_hwsim_del_radio\n   hwsim_exit_net\n\nCorrectly release the channel on start failures.",
  "id": "GHSA-w5gr-5834-37pm",
  "modified": "2026-10-06T09:31:35Z",
  "published": "2026-10-06T09:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98326"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41bee71112db53651ba9a9030de1b843255a4a7f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a4e3fa77ea36d3419d806fb5883ef425a605a5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/632f7acfe6dac1278a9314eaaab14fada400ddaf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae97fff6495a8764bc0ef281cfe5444f701e527f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b51f5a310bd6888b90bb9546a8081215dcfe6fbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0afcec2129c166e61821d6ae097061155f01b12"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98326 (GCVE-0-2026-98326)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:46 – Updated: 2026-10-06 08:46

Title

wifi: mac80211: mesh: release the channel if start fails

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mesh: release the channel if start fails ieee80211_join_mesh() acquires a channel context and then calls ieee80211_start_mesh(), which can fail. In that case, the chanctx isn't released then interface removal will attempt to unassign it after it's removed from the driver, hitting: wlan0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.c:366 at drv_unassign_vif_chanctx ieee80211_assign_link_chanctx __ieee80211_link_release_channel ieee80211_link_release_channel ieee80211_teardown_sdata unregister_netdevice_many_notify _cfg80211_unregister_wdev ieee80211_remove_interfaces ieee80211_unregister_hw mac80211_hwsim_del_radio hwsim_exit_net Correctly release the channel on start failures.

Severity

No CVSS data available.

Assigner

Linux mitre root Scorecard

References

6 references

URL	Tags
https://git.kernel.org/stable/c/f0afcec2129c166e6…
https://git.kernel.org/stable/c/b51f5a310bd6888b9…
https://git.kernel.org/stable/c/632f7acfe6dac1278…
https://git.kernel.org/stable/c/41bee71112db53651…
https://git.kernel.org/stable/c/4a4e3fa77ea36d341…
https://git.kernel.org/stable/c/ae97fff6495a8764b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < f0afcec2129c166e61821d6ae097061155f01b12 (git) Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < b51f5a310bd6888b90bb9546a8081215dcfe6fbe (git) Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < 632f7acfe6dac1278a9314eaaab14fada400ddaf (git) Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < 41bee71112db53651ba9a9030de1b843255a4a7f (git) Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < 4a4e3fa77ea36d3419d806fb5883ef425a605a5d (git) Affected: 2b5e19677592c167d012c2d129407f39d2bdeb8d , < ae97fff6495a8764bc0ef281cfe5444f701e527f (git)
Linux	Linux	Affected: 3.9 Unaffected: 0 , < 3.9 (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)

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JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/cfg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "status": "affected",
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          ]
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          "vendor": "Linux",
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "semver"
            },
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              "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": "*",
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              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T08:46:19.534Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/ae97fff6495a8764bc0ef281cfe5444f701e527f"
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      "title": "wifi: mac80211: mesh: release the channel if start fails",
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    "dateReserved": "2026-09-25T10:25:14.340Z",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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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GHSA-W5GR-5834-37PM

CVE-2026-98326 (GCVE-0-2026-98326)

Tags

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