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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-72256 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5 kernel.org
https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62 kernel.org
https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d kernel.org
https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e kernel.org
https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa kernel.org
https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e kernel.org
https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc kernel.org
https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-72256
NVD Published Date:
08/15/2026
NVD Last Modified:
08/15/2026
Source:
kernel.org