VULNERABILITY INTELLIGENCE

CVE-2021-38209

CVSS score3.3 LOW

EPSS probability0.28%

CISA KEVNot currently listed

Published2021-08-08

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

net/netfilter/nf_conntrack_standalone.c in the Linux kernel before 5.12.2 allows observation of changes in any net namespace because these changes are leaked into all other net namespaces. This is related to the NF_SYSCTL_CT_MAX, NF_SYSCTL_CT_EXPECT_MAX, and NF_SYSCTL_CT_BUCKETS sysctls.

Weakness classification

nvd@nist.gov: CWE-203

Primary references

cve@mitre.org — Mailing List, Patch, Vendor Advisory
cve@mitre.org — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory