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CVE-2026-72256

netfilter: xt_cluster: reject template conntracks in hash match

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 4558bd7b47c7be82dffd837f27be8ea3ecee557d
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < d5f9d050b0b267227c1f02f11021872c7768a9cc
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 4cb8b5f586e41c187942291cc0938006077fa79e
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < fac2fdac3baad9ffd12b3b0bba4374d4b3585d54
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 13ea4f86cf738c74be2146886ac261988a631e62
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa
Status affected
Version 0269ea4937343536ec7e85649932bc8c9686ea78
Version < 5feba91006ec92da57acc1cc2e34df623b98541e
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 2.6.30
Status affected
Version 0
Version < 2.6.30
Status unaffected
Version <= 5.10.*
Version 5.10.261
Status unaffected
Version <= 5.15.*
Version 5.15.212
Status unaffected
Version <= 6.1.*
Version 6.1.178
Status unaffected
Version <= 6.6.*
Version 6.6.145
Status unaffected
Version <= 6.12.*
Version 6.12.97
Status unaffected
Version <= 6.18.*
Version 6.18.40
Status unaffected
Version <= 7.1.*
Version 7.1.5
Status unaffected
Version <= *
Version 7.2
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.116
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d
https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc
https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e
https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54
https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62
https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5
https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa
https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e