Unrated severityNVD Advisory· Published May 26, 2021· Updated Aug 3, 2024

CVE-2021-20177

Description

A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.

Affected products

104

Linux/Linux kerneldescription
osv-coords103 versions
pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-preempt&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.2 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-docs&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/kernel-docs&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/kernel-docs&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kernel-livepatch-SLE15-SP1_Update_22&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP1 pkg:rpm/suse/kernel-livepatch-SLE15-SP2_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-source&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/kernel-source&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/kernel-source&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Proxy%204.0 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Manager%20Server%204.0 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_15&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 5.3.18-lp152.63.1+ 102 more
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1.lp152.8.21.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-lp152.63.1
- (no CPE)range: < 5.3.18-18.35.2
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 5.3.18-24.49.2.9.21.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.3
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 1-3.5.1
- (no CPE)range: < 1-5.3.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-10.31.1
- (no CPE)range: < 5.3.18-25.1
- (no CPE)range: < 4.12.14-10.31.1
- (no CPE)range: < 5.3.18-25.1
- (no CPE)range: < 5.3.18-18.35.2
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-10.31.1
- (no CPE)range: < 5.3.18-25.1
- (no CPE)range: < 5.3.18-18.35.2
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 4.12.14-16.44.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 5.3.18-24.49.2
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-122.60.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-10.31.1
- (no CPE)range: < 5.3.18-25.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 4.12.14-197.83.1
- (no CPE)range: < 1-8.3.1

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

bugzilla.redhat.com/show_bug.cgimitrex_refsource_MISC

News mentions

No linked articles in our index yet.

cvss	0.000
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000