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.
References (2)
Core 2
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/torvalds/linux/commit/2671fa4dc0109d3fb581bc3078fdf17b5d9080f6
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.2
Scores
CVSS v3
3.3
EPSS
0.0005
EPSS Percentile
14.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-203
Status
published
Products (1)
linux/linux_kernel
< 5.12.2
Published
Aug 08, 2021
Tracked Since
Feb 18, 2026