CVE-2026-98705 (GCVE-0-2026-98705)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:46 – Updated: 2026-10-21 12:55
VLAI
Title
wifi: mac80211: account proxy paths against the mesh path limit
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: account proxy paths against the mesh path limit Proxy-path churn can drive the interface path counter negative and let later mesh path additions exceed MESH_MAX_MPATHS. mesh_path_free_rcu() decrements the interface mpaths counter for entries from both the mesh and proxy path tables, but mpp_path_add() never reserves a slot in that counter. Removing or expiring a proxy path therefore returns a slot that was never charged. mesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once it falls below the number of installed paths the limit no longer holds. Reserve the shared quota before allocating a proxy path and release it on every unsuccessful addition. Mesh and proxy paths now share one 1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c , < c66ab4b94bb04c162485759196555e08c0965320 (git)
Affected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c , < df072db65fdaa34ad15e1d66fc06a53e3e97f778 (git)
Affected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c , < 3b75831ceee76d32bb8e7ddd241904f92f9b5407 (git)
Affected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c , < 5a32409ed34a1868830899a5d2437f0b3bf3532c (git)
Affected: ece1a2e7e86078c8379937b546e32cb7f25fcb6c , < a5f35d4b112af1415ff06bd501c8cc26cc08aa8b (git)
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Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mesh_pathtbl.c"
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          "vendor": "Linux",
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: account proxy paths against the mesh path limit\n\nProxy-path churn can drive the interface path counter negative and let\nlater mesh path additions exceed MESH_MAX_MPATHS.\n\nmesh_path_free_rcu() decrements the interface mpaths counter for entries\nfrom both the mesh and proxy path tables, but mpp_path_add() never\nreserves a slot in that counter. Removing or expiring a proxy path\ntherefore returns a slot that was never charged.\n\nmesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once\nit falls below the number of installed paths the limit no longer holds.\n\nReserve the shared quota before allocating a proxy path and release it on\nevery unsuccessful addition. Mesh and proxy paths now share one\n1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:55:53.953Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b"
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      ],
      "title": "wifi: mac80211: account proxy paths against the mesh path limit",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98705",
    "datePublished": "2026-10-18T15:46:35.520Z",
    "dateReserved": "2026-09-25T10:25:14.365Z",
    "dateUpdated": "2026-10-21T12:55:53.953Z",
    "state": "PUBLISHED"
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      "initial_release_date": "2026-10-20T01:01:24.000Z",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
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      "title": "wifi: mac80211: account proxy paths against the mesh path limit",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98705.json",
      "version": "3"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: account proxy paths against the mesh path limit\n\nProxy-path churn can drive the interface path counter negative and let\nlater mesh path additions exceed MESH_MAX_MPATHS.\n\nmesh_path_free_rcu() decrements the interface mpaths counter for entries\nfrom both the mesh and proxy path tables, but mpp_path_add() never\nreserves a slot in that counter. Removing or expiring a proxy path\ntherefore returns a slot that was never charged.\n\nmesh_path_add() uses the same counter to enforce MESH_MAX_MPATHS, so once\nit falls below the number of installed paths the limit no longer holds.\n\nReserve the shared quota before allocating a proxy path and release it on\nevery unsuccessful addition. Mesh and proxy paths now share one\n1024-entry budget, so mpp_path_add() can return -ENOSPC at that limit."
          }
        ],
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        "metrics": {},
        "published": "2026-10-18T16:17:24.017",
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      "cve": "CVE-2026-98705",
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      "title": "kernel: wifi: mac80211: account proxy paths against the mesh path limit",
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      "status": "interim",
      "title": "SUSE CVE CVE-2026-98705",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-98705.json",
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    }
  }
}



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