{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "05d19bf500f8281f574713479b04679fa226d0a3"
            },
            {
              "fixed": "7c2fe308bda5a7e6222d7f0c3c311991372baab4"
            },
            {
              "fixed": "fba45070e25abdae08bcaebfadeef050dc39e208"
            },
            {
              "fixed": "e1b0609b1a40da03e385be290853a604eb4c3fb9"
            },
            {
              "fixed": "9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad"
            },
            {
              "fixed": "d28aa2de9654e8024922775520a2665e00c04ad5"
            },
            {
              "fixed": "c7ead9704249d57d4693a04697e3bbd285138fa9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.19.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98238.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()\n\nThe netif index carried in the DPMAIF PIT header is five bits wide,\nbut ccmni_inst[] only has room for NIC_DEV_MAX (21) entries.\nt7xx_ccmni_recv_skb() indexes the array without a bounds check, so\nindexes 21 to 31 read past it.  The out-of-bounds value lands in the\ncallback table that follows the array, which is never NULL, so the\nexisting !ccmni check does not catch it and the driver dereferences\nwhatever sits there as a struct t7xx_ccmni.\n\nDrop the skb when the index is out of range.\n\n\nVerified in a QEMU guest with a fault injector setting the netif\nindex to 25: the unpatched driver reads a value past ccmni_inst[],\nwhich lands in the callback table, and dereferences it far enough to\nqueue the skb.  With this check the packet is dropped.  Well-formed\ntraffic on index 0 is unaffected.\n\nChanges in v2: none.",
  "id": "CVE-2026-98238",
  "modified": "2026-10-08T02:30:52.543868480Z",
  "published": "2026-10-06T08:45:09.953Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c2fe308bda5a7e6222d7f0c3c311991372baab4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9dbf13de4edff6fbc1f7ad9c4040326b6ed599ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7ead9704249d57d4693a04697e3bbd285138fa9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d28aa2de9654e8024922775520a2665e00c04ad5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1b0609b1a40da03e385be290853a604eb4c3fb9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fba45070e25abdae08bcaebfadeef050dc39e208"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98238.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98238"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: wwan: t7xx: validate the netif index in t7xx_ccmni_recv_skb()"
}