Low severity3.5NVD Advisory· Published Dec 25, 2021· Updated Jun 17, 2026

CVE-2021-45486

Description

In the IPv4 implementation in the Linux kernel before 5.12.4, net/ipv4/route.c has an information leak because the hash table is very small.

AI Insight

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

Affected products

269

Oracle Corporation/Communications Cloud Native Core Binding Support Function
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Network Exposure Function
cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*
Oracle Corporation/Communications Cloud Native Core Policy
cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*
Linux/Kernel2 versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: <5.12.4
- (no CPE)range: <5.12.4
Linux/Linux kerneldescription
osv-coords263 versions
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pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 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 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Proxy%204.1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1 pkg:rpm/suse/kernel-syms&distro=SUSE%20Manager%20Server%204.1 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP3 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-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-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP3 pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_42&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_42&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_42&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_42&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_42&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_24&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_27&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.18.0-372.9.1.el8+ 262 more
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 4.18.0-372.9.1.el8
- (no CPE)range: < 1.41-bp153.2.3.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1.18.25.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 1.41-bp153.2.3.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.4.121-92.164.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-59.40.1.18.25.1
- (no CPE)range: < 5.3.18-59.40.1.18.25.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 5.3.18-24.99.1.9.46.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 1-3.3.1
- (no CPE)range: < 1-5.3.1
- (no CPE)range: < 1-7.3.1
- (no CPE)range: < 1-150300.7.3.1
- (no CPE)range: < 1-1.5.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 4.12.14-10.73.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 4.12.14-10.73.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.4.121-92.164.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.12.14-10.73.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.4.121-92.164.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.12.14-122.106.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 5.3.18-24.99.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 4.4.180-94.153.1
- (no CPE)range: < 4.12.14-95.88.1
- (no CPE)range: < 5.3.18-38.34.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.12.14-16.85.1
- (no CPE)range: < 4.12.14-10.73.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 5.3.18-68.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 5.3.18-59.40.1
- (no CPE)range: < 4.12.14-197.105.1
- (no CPE)range: < 4.12.14-150.83.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-6.5.1
- (no CPE)range: < 1-8.3.1

Patches

Vulnerability mechanics

References

git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.cnvdPatchVendor Advisory
www.oracle.com/security-alerts/cpujul2022.htmlnvdPatchThird Party Advisory
arxiv.org/pdf/2112.09604.pdfnvdTechnical DescriptionThird Party Advisory
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4nvdRelease NotesVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.227
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000