{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3c4287f62044a90e73a561aa05fc46e62da173da"
            },
            {
              "fixed": "1957e793196e7f8557374fd4eda53abcbb42e1c0"
            },
            {
              "fixed": "57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e"
            },
            {
              "fixed": "60c1d18781e37bfb96290b86510eb01c5fa24d75"
            },
            {
              "fixed": "0a55d62cdb628923d8a21724374a70c76ac7d19d"
            },
            {
              "fixed": "dfbdac719198778b581bc0dd055df2542edb8c62"
            },
            {
              "fixed": "e047f6fbb975f685d6c9fcef95b3b7787a79b46d"
            },
            {
              "fixed": "324b749aa5b2d516ccfab933df9d3f56e7807f5f"
            },
            {
              "fixed": "d6d8cd2db236a9dd13dbc2d05843b3445cc964b5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.6.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43453.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()\n\npipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the\nto_offset argument on every iteration, including the last one where\ni == m-\u003efield_count - 1. This reads one element past the end of the\nstack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS]\nwith NFT_PIPAPO_MAX_FIELDS == 16).\n\nAlthough pipapo_unmap() returns early when is_last is true without\nusing the to_offset value, the argument is evaluated at the call site\nbefore the function body executes, making this a genuine out-of-bounds\nstack read confirmed by KASAN:\n\n  BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables]\n  Read of size 4 at addr ffff8000810e71a4\n\n  This frame has 1 object:\n   [32, 160) 'rulemap'\n\n  The buggy address is at offset 164 -- exactly 4 bytes past the end\n  of the rulemap array.\n\nPass 0 instead of rulemap[i + 1].n on the last iteration to avoid\nthe out-of-bounds read.",
  "id": "CVE-2026-43453",
  "modified": "2026-07-08T05:38:26.158074862Z",
  "published": "2026-05-08T14:22:18.087Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a55d62cdb628923d8a21724374a70c76ac7d19d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1957e793196e7f8557374fd4eda53abcbb42e1c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/324b749aa5b2d516ccfab933df9d3f56e7807f5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/60c1d18781e37bfb96290b86510eb01c5fa24d75"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6d8cd2db236a9dd13dbc2d05843b3445cc964b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfbdac719198778b581bc0dd055df2542edb8c62"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e047f6fbb975f685d6c9fcef95b3b7787a79b46d"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43453.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43453"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop()"
}