{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","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","source":"CNA: Linux","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","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-72256","cwes":[],"description":"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.","epss":{"date":"2026-11-06","percentile":0.12144,"score":0.00216},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793985581467,"publishedAt":1786773283706,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54"}],"remediation":[],"revision":"2dde8a3e6317ffadbde0f40d471c22b32082ace546845c011d2e19404d11da4c","sources":[{"modifiedAt":1793984124042,"name":"CNA: Linux","retrievedAt":1793986078560,"url":"https://www.cve.org/CVERecord?id=CVE-2026-72256"},{"modifiedAt":1793985581467,"name":"NVD","retrievedAt":1793989703601,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72256"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793986130368,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-72256"}],"ssvc":{"assessedAt":1793984018810,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"netfilter: xt_cluster: reject template conntracks in hash match","updatedAt":1793989703601}