{"apiVersion":"1.0","identifier":"CVE-2026-72256","description":"In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_cluster: reject template conntracks in hash match xt_cluster_mt() treats any non-NULL nf_ct_get() result as a fully initialized conntrack and passes it to xt_cluster_hash(). This causes a state confusion bug when the raw table CT target attaches a template conntrack to skb->_nfct before normal conntrack processing. Templates carry IPS_TEMPLATE status but do not have a valid tuple for hashing yet, so xt_cluster_hash() can hit its WARN_ON() path on the zeroed l3num field. Reject template conntracks before hashing them. This matches existing netfilter handling for template objects and avoids hashing incomplete conntrack state.","publishedAt":"2026-08-15T06:21:53","lastModifiedAt":"2026-08-17T06:18:27","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72256","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00216,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72256","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72256","en":"https://www.redsauce.net/en/cves/CVE-2026-72256","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72256","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72256","de":"https://www.redsauce.net/de/cves/CVE-2026-72256","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72256","el":"https://www.redsauce.net/el/cves/CVE-2026-72256"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72256"}}