What is CVE-2021-38209?

CVE-2021-38209 is a low-severity vulnerability in Linux Kernel, classified under Observable Discrepancy. CVSS score: 3.3/10. Published 2021-08-08.

How severe is CVE-2021-38209?

Low severity. CVSS v3 base score is 3.3 out of 10.

Vulnerability in Linux Kernel

CVE-2021-38209

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.

EPSS: 0.003 (20.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Linux Linux_kernel
N/a — versions n/a

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Mailing List, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-38209?: CVE-2021-38209 is a low-severity vulnerability in Linux Kernel, classified under Observable Discrepancy. CVSS score: 3.3/10. Published 2021-08-08.
How severe is CVE-2021-38209?: Low severity. CVSS v3 base score is 3.3 out of 10.