Unrated severityNVD Advisory· Published Aug 8, 2021· Updated Aug 4, 2024

CVE-2021-38209

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Linux kerneldescription
Ubuntu/Linux Kernelllm-fuzzy
Range: <5.12.2
osv-coords38 versions
pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-preempt&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.3 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP3 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_6&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP3 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP3 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP3 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3
< 5.3.18-59.24.1+ 37 more
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.2
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1.18.12.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.2
- (no CPE)range: < 5.3.18-59.24.1.18.12.1
- (no CPE)range: < 5.3.18-59.24.1.18.12.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 1-7.5.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-38.22.1
- (no CPE)range: < 5.3.18-59.24.1
- (no CPE)range: < 5.3.18-59.24.1

Patches

Vulnerability mechanics

References

cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2mitrex_refsource_MISC
github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6mitrex_refsource_MISC

News mentions

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