CVE-2026-72256

CVE CVE-2026-72256EUVD EUVD-2026-59155Published 2026-08-15T05:54:43.000ZLast changed 2026-08-17T05:11:14.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 0269ea4937343536ec7e85649932bc8c9686ea78 <13ea4f86cf738c74be2146886ac261988a631e62; 2.6.30; 0269ea4937343536ec7e85649932bc8c9686ea78 <4cb8b5f586e41c187942291cc0938006077fa79e; patch: 6.1.178; patch: 0; patch: 7.1.5; patch: 6.12.97; 0269ea4937343536ec7e85649932bc8c9686ea78 <5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa; patch: 5.15.212; patch: 6.6.145; 0269ea4937343536ec7e85649932bc8c9686ea78 <fac2fdac3baad9ffd12b3b0bba4374d4b3585d54; 0269ea4937343536ec7e85649932bc8c9686ea78 <d5f9d050b0b267227c1f02f11021872c7768a9cc; patch: 7.2; 0269ea4937343536ec7e85649932bc8c9686ea78 <4558bd7b47c7be82dffd837f27be8ea3ecee557d; 0269ea4937343536ec7e85649932bc8c9686ea78 <5feba91006ec92da57acc1cc2e34df623b98541e; patch: 5.10.261; patch: 6.18.40; 0269ea4937343536ec7e85649932bc8c9686ea78 <07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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