FKIE_CVE-2026-98699

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-21 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix mesh fast xmit path deletion UAF mesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion flushes the cache and then frees the path with kfree_rcu(), but a lookup that already holds the path can insert a new cache entry after the flush. The cache then points at freed memory. Set MESH_PATH_DELETED before flushing, and skip inserting a cache entry if the path or MPP path is already deleted. Check this under the cache walk lock so it is ordered with the flush. Use WRITE_ONCE() for the deletion flag updates because the cache check reads flags without taking state_lock.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebb7cba623d38733d33d79a8c7442f5ea04c0fb0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85
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": "ebb7cba623d38733d33d79a8c7442f5ea04c0fb0",
              "status": "affected",
              "version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
              "versionType": "git"
            },
            {
              "lessThan": "0117f1aa189495e6f1ff608681678817995aee39",
              "status": "affected",
              "version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
              "versionType": "git"
            },
            {
              "lessThan": "128e800a41270ab197b1cc8043637a2924865608",
              "status": "affected",
              "version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
              "versionType": "git"
            },
            {
              "lessThan": "93da3ec938bfdcfb3899428f04c6d0c56fe32952",
              "status": "affected",
              "version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
              "versionType": "git"
            },
            {
              "lessThan": "ee3aadc43ea69d98f666431e787137ac0badbb85",
              "status": "affected",
              "version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
              "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": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "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: fix mesh fast xmit path deletion UAF\n\nmesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion\nflushes the cache and then frees the path with kfree_rcu(), but a\nlookup that already holds the path can insert a new cache entry\nafter the flush. The cache then points at freed memory.\n\nSet MESH_PATH_DELETED before flushing, and skip inserting a cache\nentry if the path or MPP path is already deleted. Check this under\nthe cache walk lock so it is ordered with the flush. Use WRITE_ONCE()\nfor the deletion flag updates because the cache check reads flags\nwithout taking state_lock."
    }
  ],
  "id": "CVE-2026-98699",
  "lastModified": "2026-10-21T13:21:38.093",
  "metrics": {},
  "published": "2026-10-18T16:17:23.390",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0117f1aa189495e6f1ff608681678817995aee39"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/128e800a41270ab197b1cc8043637a2924865608"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/93da3ec938bfdcfb3899428f04c6d0c56fe32952"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ebb7cba623d38733d33d79a8c7442f5ea04c0fb0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ee3aadc43ea69d98f666431e787137ac0badbb85"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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