{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "cbd2257dc96e3e46217540fcb095a757ffa20d96"
            },
            {
              "fixed": "07acb9798477535933bd658ac9fa85b6cb10d995"
            },
            {
              "fixed": "f1e81d571e375d10e50e852223593493d98c1bac"
            },
            {
              "fixed": "c7d573551f9286100a055ef696cde6af54549677"
            }
          ],
          "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": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53211.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register\n\nNFT_META_BRI_IIFHWADDR declares its destination register with\nlen = ETH_ALEN (6 bytes), which the register-init tracking rounds up to\ntwo 32-bit registers (8 bytes). nft_meta_bridge_get_eval() then does\nmemcpy(dest, br_dev-\u003edev_addr, ETH_ALEN), writing only 6 bytes and\nleaving the upper 2 bytes of the second register as uninitialised\nnft_do_chain() stack. A downstream load of that register span leaks\nthose stale bytes to userspace.\n\nZero the second register before the memcpy so the full declared span is\nwritten.",
  "id": "CVE-2026-53211",
  "modified": "2026-07-08T05:36:23.972201123Z",
  "published": "2026-06-25T08:39:16.234Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07acb9798477535933bd658ac9fa85b6cb10d995"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7d573551f9286100a055ef696cde6af54549677"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f1e81d571e375d10e50e852223593493d98c1bac"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53211.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53211"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "netfilter: nft_meta_bridge: fix stale stack leak via IIFHWADDR register"
}