{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "2d523ba48d4ecc46acfb6aba548292cfcce1ac02"
            },
            {
              "fixed": "588933f1a2ca5ff99274f8c9f25dc3a25d0191c3"
            },
            {
              "fixed": "784aadea7a108c9f90985683caa87fb0198c6a39"
            },
            {
              "fixed": "41ec2e242f1702e8370ddfe14d22b7a766021c3e"
            },
            {
              "fixed": "db0250470f023f159094052c0bd5ab026a88ae93"
            },
            {
              "fixed": "57b0ac5e1b46f1f0338dff392ef2092e2871b412"
            },
            {
              "fixed": "6feb43c0995ab3a9c826707eb46541a1696fe4f7"
            },
            {
              "fixed": "4322dcde6b4173c2d8e8e6118ed290794263bcc8"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.142"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52915.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_hbh: reject oversized option lists\n\nstruct ip6t_opts stores at most IP6T_OPTS_OPTSNR option descriptors,\nbut hbh_mt6_check() does not reject larger optsnr values supplied from\nuserspace.\n\nValidate optsnr in the rule setup path so only match data that fits the\nfixed-size opts array can be installed. This follows the existing xtables\npattern of rejecting invalid user-provided counts in checkentry() and\nkeeps the packet matching path unchanged.\n\n`struct ip6t_opts` has a fixed `opts[IP6T_OPTS_OPTSNR]` array,\nwhere `IP6T_OPTS_OPTSNR` is 16, then off-by-one array access is possible:\n\n[  137.924693][ T8692] UBSAN: array-index-out-of-bounds in ../net/ipv6/netfilter/ip6t_hbh.c:110:29\n[  137.926167][ T8692] index 16 is out of range for type '__u16 [16]'",
  "id": "CVE-2026-52915",
  "modified": "2026-07-15T01:49:19.371120534Z",
  "published": "2026-06-24T07:14:12.569Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d523ba48d4ecc46acfb6aba548292cfcce1ac02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41ec2e242f1702e8370ddfe14d22b7a766021c3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4322dcde6b4173c2d8e8e6118ed290794263bcc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57b0ac5e1b46f1f0338dff392ef2092e2871b412"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/588933f1a2ca5ff99274f8c9f25dc3a25d0191c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6feb43c0995ab3a9c826707eb46541a1696fe4f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/784aadea7a108c9f90985683caa87fb0198c6a39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db0250470f023f159094052c0bd5ab026a88ae93"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52915.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52915"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "netfilter: ip6t_hbh: reject oversized option lists"
}