{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "08027f6b790be1e444e4182fb4dc53faa6539d16"
            },
            {
              "fixed": "76c847e80d2b6be047707d58e8e05eedbe2593ad"
            },
            {
              "fixed": "e69bde4eb566aea8fa97cbb93e0bab608964f1a5"
            },
            {
              "fixed": "3220b62fbb8a55feebd2a826d5ead0f49f09ed5a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90077.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix a resource leak in copy_net_ns() error handling path\n\nCurrently, preinit_net() does two things:\n\n  (1) call ns_common_init() which might fail\n  (2) initialize resources which does not fail\n\nHowever, preinit_net() is returning early when (1) fails, and copy_net_ns()\nis jumping to the dec_ucounts: label. As a result, resources allocated by\nnet_alloc() are leaking. We need to call key_remove_domain() and\nnet_passive_dec() in order to release resources allocated by net_alloc().\n\nWe cannot simply jump to the put_userns: label when preinit_net() failed,\nfor (2) is not yet done. But we can reorder (1) and (2), for there is no\ndependency between (1) and (2). Therefore, this patch decouples (1) from\npreinit_net() and changes preinit_net() back to a void function, and calls\nns_common_init() after preinit_net() succeeded. Then, we can jump to\nimmediately after ns_common_free() of the put_userns: label.",
  "id": "CVE-2026-90077",
  "modified": "2026-09-18T03:30:56.808380830Z",
  "published": "2026-09-17T16:05:56.226Z",
  "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/3220b62fbb8a55feebd2a826d5ead0f49f09ed5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76c847e80d2b6be047707d58e8e05eedbe2593ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e69bde4eb566aea8fa97cbb93e0bab608964f1a5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90077.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90077"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net: fix a resource leak in copy_net_ns() error handling path"
}