Unrated severityNVD Advisory· Published Mar 15, 2024· Updated May 4, 2025

neighbour: allow NUD_NOARP entries to be forced GCed

CVE-2021-47109

Description

In the Linux kernel, the following vulnerability has been resolved:

IFF_POINTOPOINT interfaces use NUD_NOARP entries for IPv6. It's possible to fill up the neighbour table with enough entries that it will overflow for valid connections after that.

This behaviour is more prevalent after commit 58956317c8de ("neighbor: Improve garbage collection") is applied, as it prevents removal from entries that are not NUD_FAILED, unless they are more than 5s old.

Affected products

osv-coords67 versions
pkg:rpm/suse/kernel-64kb&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 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%20Micro%205.2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-docs&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-livepatch-SLE15-SP2_Update_47&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP2 pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_43&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-preempt&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-source&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.1 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%207.1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSS
< 5.3.18-150300.59.158.1+ 66 more
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150200.24.188.1.150200.9.95.3
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150200.24.188.1.150200.9.95.3
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150200.24.188.1.150200.9.95.3
- (no CPE)range: < 5.3.18-150300.59.158.1.150300.18.92.5
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 1-150200.5.3.3
- (no CPE)range: < 1-150300.7.3.5
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.166.1
- (no CPE)range: < 5.3.18-150300.166.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.166.1
- (no CPE)range: < 5.3.18-150300.166.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150200.24.188.1
- (no CPE)range: < 5.3.18-150300.59.158.1
- (no CPE)range: < 5.3.18-150300.59.158.1
Linux/Linuxcpe-rescue
Range: 5.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

News mentions

No linked articles in our index yet.

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