Vulnerability · Published Aug 8, 2021 · Assigned by mitre
CVE-2021-38209
Low 3.3
In plain English
A low-severity security flaw in the linux package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)3.3Low
Exploit odds (30 days)0.3%top 79.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.10.38-1 | DEBIAN-CVE-2021-38209 |
| Debian:13 | linux | 5.10.38-1 | DEBIAN-CVE-2021-38209 |
| Debian:14 | linux | 5.10.38-1 | DEBIAN-CVE-2021-38209 |