{"api_version":"1","generated_at":"2026-06-24T23:24:25+00:00","cve":"CVE-2026-52915","urls":{"html":"https://cve.report/CVE-2026-52915","api":"https://cve.report/api/cve/CVE-2026-52915.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52915","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52915"},"summary":{"title":"netfilter: ip6t_hbh: reject oversized option lists","description":"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]'","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-24 08:16:21","updated_at":"2026-06-24 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Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52915","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 2d523ba48d4ecc46acfb6aba548292cfcce1ac02 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 588933f1a2ca5ff99274f8c9f25dc3a25d0191c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 784aadea7a108c9f90985683caa87fb0198c6a39 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 41ec2e242f1702e8370ddfe14d22b7a766021c3e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_hbh.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"2d523ba48d4ecc46acfb6aba548292cfcce1ac02","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"588933f1a2ca5ff99274f8c9f25dc3a25d0191c3","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"784aadea7a108c9f90985683caa87fb0198c6a39","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"41ec2e242f1702e8370ddfe14d22b7a766021c3e","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"db0250470f023f159094052c0bd5ab026a88ae93","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"57b0ac5e1b46f1f0338dff392ef2092e2871b412","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"6feb43c0995ab3a9c826707eb46541a1696fe4f7","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"4322dcde6b4173c2d8e8e6118ed290794263bcc8","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_hbh.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.258","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.209","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.175","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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]'"}],"providerMetadata":{"dateUpdated":"2026-06-24T07:14:12.569Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/2d523ba48d4ecc46acfb6aba548292cfcce1ac02"},{"url":"https://git.kernel.org/stable/c/588933f1a2ca5ff99274f8c9f25dc3a25d0191c3"},{"url":"https://git.kernel.org/stable/c/784aadea7a108c9f90985683caa87fb0198c6a39"},{"url":"https://git.kernel.org/stable/c/41ec2e242f1702e8370ddfe14d22b7a766021c3e"},{"url":"https://git.kernel.org/stable/c/db0250470f023f159094052c0bd5ab026a88ae93"},{"url":"https://git.kernel.org/stable/c/57b0ac5e1b46f1f0338dff392ef2092e2871b412"},{"url":"https://git.kernel.org/stable/c/6feb43c0995ab3a9c826707eb46541a1696fe4f7"},{"url":"https://git.kernel.org/stable/c/4322dcde6b4173c2d8e8e6118ed290794263bcc8"}],"title":"netfilter: ip6t_hbh: reject oversized option lists","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52915","datePublished":"2026-06-24T07:14:12.569Z","dateReserved":"2026-06-09T07:44:35.367Z","dateUpdated":"2026-06-24T07:14:12.569Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-24 08:16:21","lastModifiedDate":"2026-06-24 08:16:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52915","Ordinal":"1","Title":"netfilter: ip6t_hbh: reject oversized option lists","CVE":"CVE-2026-52915","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52915","Ordinal":"1","NoteData":"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]'","Type":"Description","Title":"netfilter: ip6t_hbh: reject oversized option lists"}]}}}