{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9b8a74e3482f9fc077a88c13fa0ceca8feb0b772"
            },
            {
              "fixed": "63e7064b4c1c4b540bf2f0cba47384f92ab95307"
            },
            {
              "fixed": "6f63e919fe1e335b8abcb3a28bfd4804a98d875a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.24"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98810.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()\n\nieee80211_monitor_select_queue() validates the skb length using skb-\u003elen\nbefore dereferencing pointers into skb-\u003edata to access the 802.11 header.\nHowever, skb-\u003elen includes data in both the linear head buffer and\nnon-linear fragments/pages. When AF_PACKET sends a packet large enough to\nbecome non-linear, the 802.11 header at skb-\u003edata + len_rthdr may extend\npast the linear head buffer even though skb-\u003elen appears sufficient.\n\nThis leads to a slab-out-of-bounds read when accessing hdr-\u003eframe_control,\nas the kernel reads beyond the allocated skb head buffer:\n\n  BUG: KASAN: slab-out-of-bounds in ieee80211_monitor_select_queue+0x1ed/0x220\n\nsyzbot has hit the same issues.\n\nFix this by checking skb_headlen(skb) (which gives the length of the\nlinear data region) instead of skb-\u003elen before dereferencing skb-\u003edata\npointers. This ensures the required bytes are actually present in the\nlinear portion of the skb.\n\nApply the same fix to ieee80211_validate_radiotap_len() which has the\nsame class of bug: it uses skb-\u003elen to validate accesses to skb-\u003edata,\nand to the corresponding checks in ieee80211_monitor_start_xmit(): for\ndrivers advertising NETIF_F_SG the skb is not linearized before\nndo_start_xmit, so the 802.11 header can be read past the linear\nbuffer there as well.",
  "id": "CVE-2026-98810",
  "modified": "2026-10-20T02:31:08.682770239Z",
  "published": "2026-10-18T15:48:56.733Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63e7064b4c1c4b540bf2f0cba47384f92ab95307"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f63e919fe1e335b8abcb3a28bfd4804a98d875a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98810.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98810"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mac80211: fix slab-out-of-bounds read in ieee80211_monitor_select_queue()"
}