{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "fec0fe6838a7f45175667701fb51abb23a6ffb1e"
            },
            {
              "fixed": "b859ba18b5a1067f71db5618c6a4a70d55fa308b"
            },
            {
              "fixed": "8b855b645841b5a04e20339a22bb6d593c9b790d"
            },
            {
              "fixed": "d360b31f1a3666579422872aa7d1a751e20b76f9"
            },
            {
              "fixed": "060f827aa3dc47939ee306da715cd6700d129616"
            },
            {
              "fixed": "41dcae82bece9f106b4dff0ee777bba8d157c8a8"
            },
            {
              "fixed": "cb3528ad8bb46fa6252f5d14ced7febddc18515d"
            },
            {
              "fixed": "72f9dd522f8d6c5a00be9695c7bb74631eb5069e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "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": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98555.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nllc: fix skb UAF and leaks on llc_mac_hdr_init() failure\n\nIn llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(), if llc_mac_hdr_init()\nfails, kfree_skb(skb) is called instead of kfree_skb(nskb). This leaks\nthe newly allocated nskb, reads from the freed skb via LLC_I_GET_NR(pdu),\nand double-frees skb when llc_conn_state_process() drops its reference.\n\nIn llc_sap_action_send_xid_r() and llc_sap_action_send_test_r(), nskb is\nleaked if llc_mac_hdr_init() returns an error.\n\nFree nskb in all three error paths.",
  "id": "CVE-2026-98555",
  "modified": "2026-10-20T02:31:04.303967305Z",
  "published": "2026-10-18T15:18:22.631Z",
  "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/060f827aa3dc47939ee306da715cd6700d129616"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41dcae82bece9f106b4dff0ee777bba8d157c8a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72f9dd522f8d6c5a00be9695c7bb74631eb5069e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b855b645841b5a04e20339a22bb6d593c9b790d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b859ba18b5a1067f71db5618c6a4a70d55fa308b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb3528ad8bb46fa6252f5d14ced7febddc18515d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d360b31f1a3666579422872aa7d1a751e20b76f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fec0fe6838a7f45175667701fb51abb23a6ffb1e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98555.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98555"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "llc: fix skb UAF and leaks on llc_mac_hdr_init() failure"
}