FKIE_CVE-2026-98705

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0e79c9d260862bd4676955d3cac7baa0d38a5b2e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f83dab0045f756a82a15ac751165aefa03bed11
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfd447ee32f727e535e317aa5a8447488f943803
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mesh_pathtbl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0e79c9d260862bd4676955d3cac7baa0d38a5b2e",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "bfd447ee32f727e535e317aa5a8447488f943803",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "7f83dab0045f756a82a15ac751165aefa03bed11",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "c66ab4b94bb04c162485759196555e08c0965320",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "df072db65fdaa34ad15e1d66fc06a53e3e97f778",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "3b75831ceee76d32bb8e7ddd241904f92f9b5407",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "5a32409ed34a1868830899a5d2437f0b3bf3532c",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            },
            {
              "lessThan": "a5f35d4b112af1415ff06bd501c8cc26cc08aa8b",
              "status": "affected",
              "version": "ece1a2e7e86078c8379937b546e32cb7f25fcb6c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mesh_pathtbl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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: 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."
    }
  ],
  "id": "CVE-2026-98705",
  "lastModified": "2026-10-30T13:21:19.747",
  "metrics": {},
  "published": "2026-10-18T16:17:24.017",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0e79c9d260862bd4676955d3cac7baa0d38a5b2e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b75831ceee76d32bb8e7ddd241904f92f9b5407"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5a32409ed34a1868830899a5d2437f0b3bf3532c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7f83dab0045f756a82a15ac751165aefa03bed11"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a5f35d4b112af1415ff06bd501c8cc26cc08aa8b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bfd447ee32f727e535e317aa5a8447488f943803"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c66ab4b94bb04c162485759196555e08c0965320"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df072db65fdaa34ad15e1d66fc06a53e3e97f778"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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