FKIE_CVE-2026-98327

Vulnerability from fkie_nvd - Published: 2026-10-06 09:18 - Updated: 2026-10-19 10:18
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mesh: reset the CSA state when leaving ifmsh->csa is allocated in ieee80211_mesh_csa_beacon() and only freed in ieee80211_mesh_finish_csa(), i.e. when the channel switch completes. Leaving the mesh while a switch is still pending therefore leaks it. Additionally, ifmsh->csa_role and ifmsh->chsw_ttl have their state leak in this case, so things can get mixed up in addition to the memory leak. Refactor the reset and call it in ieee80211_stop_mesh() to fix it all.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/860134b3af77970e006feab7e5decb8c84771c7f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aba8dfb45864441199748c33ce3c1c8ca121c8bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ba5bf83a81e8832cb84bb3a2da67512f81f57a02
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bd3b21145ae2e781daac1bbd19216a63ab4e0cbd
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mesh.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aba8dfb45864441199748c33ce3c1c8ca121c8bd",
              "status": "affected",
              "version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
              "versionType": "git"
            },
            {
              "lessThan": "bd3b21145ae2e781daac1bbd19216a63ab4e0cbd",
              "status": "affected",
              "version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
              "versionType": "git"
            },
            {
              "lessThan": "ba5bf83a81e8832cb84bb3a2da67512f81f57a02",
              "status": "affected",
              "version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
              "versionType": "git"
            },
            {
              "lessThan": "860134b3af77970e006feab7e5decb8c84771c7f",
              "status": "affected",
              "version": "b8456a14e9d2770846fcf74de18ff95b676149a3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/mesh.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: mesh: reset the CSA state when leaving\n\nifmsh-\u003ecsa is allocated in ieee80211_mesh_csa_beacon() and only freed\nin ieee80211_mesh_finish_csa(), i.e. when the channel switch completes.\nLeaving the mesh while a switch is still pending therefore leaks it.\n\nAdditionally, ifmsh-\u003ecsa_role and ifmsh-\u003echsw_ttl have their state leak\nin this case, so things can get mixed up in addition to the memory\nleak.\n\nRefactor the reset and call it in ieee80211_stop_mesh() to fix it all."
    }
  ],
  "id": "CVE-2026-98327",
  "lastModified": "2026-10-19T10:18:34.890",
  "metrics": {},
  "published": "2026-10-06T09:18:24.980",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/860134b3af77970e006feab7e5decb8c84771c7f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/aba8dfb45864441199748c33ce3c1c8ca121c8bd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ba5bf83a81e8832cb84bb3a2da67512f81f57a02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bd3b21145ae2e781daac1bbd19216a63ab4e0cbd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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