{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3881ac441f642d56503818123446f7298442236b"
            },
            {
              "fixed": "5739be5c19495d709d902a2912c9102ce78740d5"
            },
            {
              "fixed": "bc6c6e546ffff8865daaeb622ef348c2d481e80f"
            },
            {
              "fixed": "e3e0679fc950191aff8f27fa78abcfc2462cff4a"
            },
            {
              "fixed": "4dc0e63abf8bc7ba8892e617c1fb8b204361e022"
            },
            {
              "fixed": "1801cb20a5025a787d6853e19c38db138344b4b4"
            },
            {
              "fixed": "c75a950e77356e526672cba4584080c6c8b793b6"
            },
            {
              "fixed": "5595ea59cdf29182cf6a270cacc1426c57b603de"
            },
            {
              "fixed": "4fa349156043dc119721d067329714179f501749"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.2.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68397.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: take a reference on the socket found in afiucv_hs_rcv()\n\nafiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,\ndrops the lock, and then passes the socket to the afiucv_hs_callback_*()\nhandlers without holding a reference. AF_IUCV sockets are not\nRCU-protected and are freed synchronously by iucv_sock_kill() -\u003e\nsock_put(), so a concurrent close can free the socket in the window\nbetween read_unlock() and the handler, which then dereferences freed\nmemory (for example sk-\u003esk_data_ready() in afiucv_hs_callback_syn()).\n\nTake a reference with sock_hold() while the socket is still on the list\nand release it with sock_put() once the handler has run.",
  "id": "CVE-2026-68397",
  "modified": "2026-08-21T03:30:18.360844805Z",
  "published": "2026-08-10T12:04:16.772Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1801cb20a5025a787d6853e19c38db138344b4b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dc0e63abf8bc7ba8892e617c1fb8b204361e022"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4fa349156043dc119721d067329714179f501749"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5595ea59cdf29182cf6a270cacc1426c57b603de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5739be5c19495d709d902a2912c9102ce78740d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc6c6e546ffff8865daaeb622ef348c2d481e80f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c75a950e77356e526672cba4584080c6c8b793b6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3e0679fc950191aff8f27fa78abcfc2462cff4a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68397.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68397"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net/iucv: take a reference on the socket found in afiucv_hs_rcv()"
}