{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f6d0cbcf09c506b9b022df8f9d7693a7cec3c732"
            },
            {
              "fixed": "6744e49fe51bfba26522acc2d0e9703cb41d8e50"
            },
            {
              "fixed": "eca18feed38b3377a2ec5d1f22af1170c55d0171"
            },
            {
              "fixed": "d19ddef8c327a4773ff81f8e51027d1e0b4cf069"
            },
            {
              "fixed": "eb8a8124484dbc3c2b543e207da39bbccb703d31"
            },
            {
              "fixed": "8c84885e9790823828bb8084736ea15769b1ac16"
            },
            {
              "fixed": "84d8f58cf28a0415413f43ba7148f7bacd4c1b6e"
            },
            {
              "fixed": "3544210609f6d1db282bbdeca639104ef624c393"
            },
            {
              "fixed": "ab185e0c4fb82dfba6fb86f8271e06f931d9c64c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.10.0"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "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-2026-53134.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_fib: fix stale stack leak via the OIFNAME register\n\nFor NFT_FIB_RESULT_OIFNAME the destination register is declared with\nlen = IFNAMSIZ (four 32-bit registers), but on the lookup-fail,\nRTN_LOCAL and oif-mismatch paths nft_fib{4,6}_eval() only writes one\nregister via \"*dest = 0\". The remaining three registers are left as\nwhatever was on the stack in nft_do_chain()'s struct nft_regs, and a\ndownstream expression that loads the register span can leak that\nuninitialised kernel stack to userspace.\n\nThe NFTA_FIB_F_PRESENT existence check has the same shape: it is only\nmeaningful for NFT_FIB_RESULT_OIF, yet it was accepted for any result type\nwhile the eval stores a single byte via nft_reg_store8(), leaving the rest\nof the declared span stale.\n\nFix both:\n\n - replace the bare \"*dest = 0\" in the eval with nft_fib_store_result(),\n   which strscpy_pad()s the whole IFNAMSIZ for OIFNAME (and is already\n   used on the other early-return path), and\n\n - restrict NFTA_FIB_F_PRESENT to NFT_FIB_RESULT_OIF and declare its\n   destination as a single u8, so the marked span matches the one byte\n   the eval writes.",
  "id": "CVE-2026-53134",
  "modified": "2026-07-09T03:52:07.730518348Z",
  "published": "2026-06-25T08:38:23.348Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3544210609f6d1db282bbdeca639104ef624c393"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6744e49fe51bfba26522acc2d0e9703cb41d8e50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84d8f58cf28a0415413f43ba7148f7bacd4c1b6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8c84885e9790823828bb8084736ea15769b1ac16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab185e0c4fb82dfba6fb86f8271e06f931d9c64c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d19ddef8c327a4773ff81f8e51027d1e0b4cf069"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb8a8124484dbc3c2b543e207da39bbccb703d31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eca18feed38b3377a2ec5d1f22af1170c55d0171"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53134.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53134"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "netfilter: nft_fib: fix stale stack leak via the OIFNAME register"
}