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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (18.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6 (Patch, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2 (Patch, Mailing List, 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.