{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "18f84d41d34fa35d0d64bbaea01fe664553ecc06"
            },
            {
              "fixed": "c107233d2ff4fd7cef5d02f9124b99194957a710"
            },
            {
              "fixed": "6329d3a9afe715fddda0460cfa46b496d61c2fe0"
            },
            {
              "fixed": "7445fe965b7d8756070a40e80f8b73348ccda1d7"
            },
            {
              "fixed": "c4d257734e91bfcdc71d41843392dd6400b5bb1b"
            },
            {
              "fixed": "3219d74e4536658c937fd878a327257b86ce80dd"
            },
            {
              "fixed": "e4b4984e28c16406ecb318444dea4a8bf47def3e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.2.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72436.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types\n\nSashiko pointed out that there are a few lockless RCU readers\nusing test_bit() which is a relaxed atomic operation and\nprovides no memory barrier guarantees. Use test_bit_acquire()\ninstead where the operation may run parallel with add/del/gc,\ni.e. is not one from the next cases\n\n- protected by region lock\n- in a set destroy phase\n- in a new/temporary set creation phase",
  "id": "CVE-2026-72436",
  "modified": "2026-08-16T03:31:15.226455614Z",
  "published": "2026-08-15T05:56:50.051Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3219d74e4536658c937fd878a327257b86ce80dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6329d3a9afe715fddda0460cfa46b496d61c2fe0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7445fe965b7d8756070a40e80f8b73348ccda1d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c107233d2ff4fd7cef5d02f9124b99194957a710"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4d257734e91bfcdc71d41843392dd6400b5bb1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4b4984e28c16406ecb318444dea4a8bf47def3e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72436.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72436"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types"
}