CVE-2026-72256: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-72256DEBIAN-CVE-2026-72256
Published 15-08-2026Last modified 17-08-2026
Open JSON

Vulnerability summary

CVE-2026-72256 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.4% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 24 · Related 24
OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:24197-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu169 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
  • linux≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 4558bd7b47c7be82dffd837f27be8ea3ecee557d | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < d5f9d050b0b267227c1f02f11021872c7768a9cc | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 4cb8b5f586e41c187942291cc0938006077fa79e | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < fac2fdac3baad9ffd12b3b0bba4374d4b3585d54 | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 13ea4f86cf738c74be2146886ac261988a631e62 | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5 | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa | ≥ 0269ea4937343536ec7e85649932bc8c9686ea78, < 5feba91006ec92da57acc1cc2e34df623b98541e | 2.6.30

3 vendors · 171 products

References

26 links
Show all 26 references