{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "900575aa33a3eaaef802b31de187a85c4a4b4bd0"
            },
            {
              "fixed": "9a9e69155b2091b8297afaf1533b8d68a3096841"
            },
            {
              "fixed": "1c52ef00e391144334f10995985c2f256d4be982"
            },
            {
              "fixed": "a1d0f6cbb962af29586e3e65a4bced1a5e39221f"
            },
            {
              "fixed": "60a25ef8dacb3566b1a8c4de00572a498e2a3bf9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "363cc6efdbb54bb06cd5034a69b41aae974a736f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.7.7"
            },
            {
              "fixed": "5.8"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.8.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.20.0"
            },
            {
              "fixed": "7.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31579.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit\n\nwg_netns_pre_exit() manually acquires rtnl_lock() inside the\npernet .pre_exit callback.  This causes a hung task when another\nthread holds rtnl_mutex - the cleanup_net workqueue (or the\nsetup_net failure rollback path) blocks indefinitely in\nwg_netns_pre_exit() waiting to acquire the lock.\n\nConvert to .exit_rtnl, introduced in commit 7a60d91c690b (\"net:\nAdd -\u003eexit_rtnl() hook to struct pernet_operations.\"), where the\nframework already holds RTNL and batches all callbacks under a\nsingle rtnl_lock()/rtnl_unlock() pair, eliminating the contention\nwindow.\n\nThe rcu_assign_pointer(wg-\u003ecreating_net, NULL) is safe to move\nfrom .pre_exit to .exit_rtnl (which runs after synchronize_rcu())\nbecause all RCU readers of creating_net either use maybe_get_net()\n- which returns NULL for a dying namespace with zero refcount - or\naccess net-\u003euser_ns which remains valid throughout the entire\nops_undo_list sequence.\n\n[ Jason: added __net_exit and __read_mostly annotations that were missing. ]",
  "id": "CVE-2026-31579",
  "modified": "2026-07-15T01:49:11.169907585Z",
  "published": "2026-04-24T14:42:10.208Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1c52ef00e391144334f10995985c2f256d4be982"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60a25ef8dacb3566b1a8c4de00572a498e2a3bf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a9e69155b2091b8297afaf1533b8d68a3096841"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1d0f6cbb962af29586e3e65a4bced1a5e39221f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31579.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31579"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit"
}