{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8f840e47f190cbe61a96945c13e9551048d42cef"
            },
            {
              "fixed": "f98c294a9369b6fe89e652c06357ee594be4dfa2"
            },
            {
              "fixed": "8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a"
            },
            {
              "fixed": "ec3c2d59a192e17e1014ba71afc368ba162ecac3"
            },
            {
              "fixed": "722576aba0a6d9423714550b1c03239b0f0def77"
            },
            {
              "fixed": "abe7f8828e6ac8be858870c2bf836258844f97d5"
            },
            {
              "fixed": "207bb4ce8fe7de961ae7bb33569ad2cd61f44954"
            },
            {
              "fixed": "f09a245f33e567b604efa1960b7a2d25dd9c8713"
            },
            {
              "fixed": "7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.7.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "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-2026-72447.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: hold socket lock when dumping endpoints in sctp_diag\n\nSCTP_DIAG endpoint dumping was traversing endpoint address lists without\nholding lock_sock(), while those lists could change concurrently via\nsocket operations (e.g., bindx changes). This creates a race where\nnla_reserve() counts addresses under RCU protection, but the subsequent\ncopy may see fewer entries, potentially leaking uninitialized memory to\nuserspace.\n\nFix this by:\n\n- Taking a reference on each endpoint during hash traversal\n- Moving socket operations (lock_sock()) outside read_lock_bh()\n- Serializing address list access during dump\n- Reworking sctp_for_each_endpoint() to support restart-based traversal\n  with (net, pos) tracking\n\nAlso:\n\n- Add WARN_ON_ONCE() for inconsistent address counts\n- Fix idiag_states filtering for LISTEN vs association cases\n- Skip dumping endpoints being freed (ep-\u003ebase.dead)\n- Move dump position tracking into iterator, removing cb-\u003eargs[4] and\n  its comment for sctp_ep_dump().,\n- Update the comment for cb-\u003eargs[4] and remove the comment for unused\n  cb-\u003eargs[5] for sctp_sock_dump().\n\nNote: traversal is restart-based and may re-scan buckets multiple times,\nbut this is acceptable due to small bucket sizes and required to support\nsleeping-safe callbacks.\n\nThis issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero\nDay Initiative.",
  "id": "CVE-2026-72447",
  "modified": "2026-08-18T03:31:06.601248051Z",
  "published": "2026-08-15T05:56:57.089Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/207bb4ce8fe7de961ae7bb33569ad2cd61f44954"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/722576aba0a6d9423714550b1c03239b0f0def77"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abe7f8828e6ac8be858870c2bf836258844f97d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec3c2d59a192e17e1014ba71afc368ba162ecac3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f09a245f33e567b604efa1960b7a2d25dd9c8713"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f98c294a9369b6fe89e652c06357ee594be4dfa2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72447.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72447"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "sctp: hold socket lock when dumping endpoints in sctp_diag"
}