{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "675fc275a3a2d905535207237402c6d8dcb5fa4b"
            },
            {
              "fixed": "a51e7fbe94a87e236631a83973d4f558310b2cd2"
            },
            {
              "fixed": "a0c584fc18056709c8e047a82a6045d6c209f4ce"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.16.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53089.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix use-after-free in offloaded map/prog info fill\n\nWhen querying info for an offloaded BPF map or program,\nbpf_map_offload_info_fill_ns() and bpf_prog_offload_info_fill_ns()\nobtain the network namespace with get_net(dev_net(offmap-\u003enetdev)).\nHowever, the associated netdev's netns may be racing with teardown\nduring netns destruction. If the netns refcount has already reached 0,\nget_net() performs a refcount_t increment on 0, triggering:\n\n  refcount_t: addition on 0; use-after-free.\n\nAlthough rtnl_lock and bpf_devs_lock ensure the netdev pointer remains\nvalid, they cannot prevent the netns refcount from reaching zero.\n\nFix this by using maybe_get_net() instead of get_net(). maybe_get_net()\nuses refcount_inc_not_zero() and returns NULL if the refcount is already\nzero, which causes ns_get_path_cb() to fail and the caller to return\n-ENOENT -- the correct behavior when the netns is being destroyed.",
  "id": "CVE-2026-53089",
  "modified": "2026-07-08T05:39:15.250685248Z",
  "published": "2026-06-24T16:30:28.531Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0c584fc18056709c8e047a82a6045d6c209f4ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a51e7fbe94a87e236631a83973d4f558310b2cd2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53089.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53089"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "bpf: Fix use-after-free in offloaded map/prog info fill"
}