CVE-2021-45485

Name: CVE-2021-45485
Creator: NVD / NIST
Published: 2021-12-25T02:15:06.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.62%

Last modified Jun 17, 2026

CVE-2021-45485 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.. EPSS estimates a 3.62% chance of exploitation in the next 30 days.

Description

In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

3.62%

88.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-327

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 5.13.3
Netapp	E-Series Santricity Os Controller	All versions
Netapp	Solidfire\, Enterprise Sds \& Hci Storage Node	All versions
Netapp	Solidfire \& Hci Management Node	All versions
Netapp	Brocade Fabric Operating System Firmware	All versions
Oracle	Communications Cloud Native Core Binding Support Function	22.1.3
Oracle	Communications Cloud Native Core Network Exposure Function	22.1.1
Oracle	Communications Cloud Native Core Policy	22.2.0
Netapp	All Flash Fabric-Attached Storage 8300 Firmware	All versions
Netapp	Fabric-Attached Storage 8300 Firmware	All versions
Netapp	All Flash Fabric-Attached Storage 8700 Firmware	All versions
Netapp	Fabric-Attached Storage 8700 Firmware	All versions
Netapp	Aff A400 Firmware	All versions
Netapp	Fabric-Attached Storage A400 Firmware	All versions
Netapp	Hci Compute Node Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H300s Firmware	All versions
Netapp	H410c Firmware	All versions
Netapp	H410s Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H610c Firmware	All versions
Netapp	H610s Firmware	All versions
Netapp	H615c Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H700s Firmware	All versions

References

https://arxiv.org/pdf/2112.09604.pdfTechnical Description, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20220121-0001/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
https://arxiv.org/pdf/2112.09604.pdfTechnical Description, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3Release Notes, Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99Patch, Vendor Advisory
https://security.netapp.com/advisory/ntap-20220121-0001/Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory

Timeline

Published: Dec 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-45485?

How severe is CVE-2021-45485?

CVE-2021-45485 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-45485?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-45485?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST