{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72256", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.915Z", "datePublished": "2026-08-15T05:54:43.706Z", "dateUpdated": "2026-08-15T05:54:43.706Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:54:43.706Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_cluster: reject template conntracks in hash match\n\nxt_cluster_mt() treats any non-NULL nf_ct_get() result as a fully\ninitialized conntrack and passes it to xt_cluster_hash().\n\nThis causes a state confusion bug when the raw table CT target attaches\na template conntrack to skb->_nfct before normal conntrack processing.\nTemplates carry IPS_TEMPLATE status but do not have a valid tuple for\nhashing yet, so xt_cluster_hash() can hit its WARN_ON() path on the\nzeroed l3num field.\n\nReject template conntracks before hashing them. This matches existing\nnetfilter handling for template objects and avoids hashing incomplete\nconntrack state."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/xt_cluster.c"], "versions": [{"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "4558bd7b47c7be82dffd837f27be8ea3ecee557d", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "d5f9d050b0b267227c1f02f11021872c7768a9cc", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "4cb8b5f586e41c187942291cc0938006077fa79e", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "fac2fdac3baad9ffd12b3b0bba4374d4b3585d54", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "13ea4f86cf738c74be2146886ac261988a631e62", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa", "status": "affected", "versionType": "git"}, {"version": "0269ea4937343536ec7e85649932bc8c9686ea78", "lessThan": "5feba91006ec92da57acc1cc2e34df623b98541e", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/xt_cluster.c"], "versions": [{"version": "2.6.30", "status": "affected"}, {"version": "0", "lessThan": "2.6.30", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.30", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d"}, {"url": "https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc"}, {"url": "https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e"}, {"url": "https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54"}, {"url": "https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62"}, {"url": "https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5"}, {"url": "https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa"}, {"url": "https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e"}], "title": "netfilter: xt_cluster: reject template conntracks in hash match", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/xt_cluster.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4558bd7b47c7be82dffd837f27be8ea3ecee557d", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "d5f9d050b0b267227c1f02f11021872c7768a9cc", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "4cb8b5f586e41c187942291cc0938006077fa79e", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "fac2fdac3baad9ffd12b3b0bba4374d4b3585d54", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "13ea4f86cf738c74be2146886ac261988a631e62", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}, {"lessThan": "5feba91006ec92da57acc1cc2e34df623b98541e", "status": "affected", "version": "0269ea4937343536ec7e85649932bc8c9686ea78", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/xt_cluster.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.30"}, {"lessThan": "2.6.30", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_cluster: reject template conntracks in hash match\n\nxt_cluster_mt() treats any non-NULL nf_ct_get() result as a fully\ninitialized conntrack and passes it to xt_cluster_hash().\n\nThis causes a state confusion bug when the raw table CT target attaches\na template conntrack to skb->_nfct before normal conntrack processing.\nTemplates carry IPS_TEMPLATE status but do not have a valid tuple for\nhashing yet, so xt_cluster_hash() can hit its WARN_ON() path on the\nzeroed l3num field.\n\nReject template conntracks before hashing them. This matches existing\nnetfilter handling for template objects and avoids hashing incomplete\nconntrack state."}], "id": "CVE-2026-72256", "lastModified": "2026-08-15T06:21:53.310", "metrics": {}, "published": "2026-08-15T06:21:53.310", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,4558bd7b47c7be82dffd837f27be8ea3ecee557d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,d5f9d050b0b267227c1f02f11021872c7768a9cc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,4cb8b5f586e41c187942291cc0938006077fa79e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,fac2fdac3baad9ffd12b3b0bba4374d4b3585d54)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,13ea4f86cf738c74be2146886ac261988a631e62)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0269ea4937343536ec7e85649932bc8c9686ea78,5feba91006ec92da57acc1cc2e34df623b98541e)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.30"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.30)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "7.2-rc1"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T18:00:11.035950+00:00", "updated": "2026-08-15T19:15:03.348730+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-682"]}