CVE-2021-45485 Information disclosure in n/a

What is CVE-2021-45485?

CVE-2021-45485 is a high-severity vulnerability in Linux kernel, published on 25 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-327

Which versions are affected by CVE-2021-45485?

It affects 26 products.

Products include Linux kernel, Netapp Aff A400 Firmware, Netapp All Flash Fabric-Attached Storage 8300 Firmware, Netapp All Flash Fabric-Attached Storage 8700 Firmware, Netapp Brocade Fabric Operating System Firmware, Netapp E-Series Santricity Os Controller and 20 more.

How do I fix CVE-2021-45485?

Apply the vendor's patch.

Is CVE-2021-45485 being exploited?

There is no known exploitation of CVE-2021-45485 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-7109, DEBIAN-CVE-2021-45485, GHSA-4q84-7284-2fp5, UBUNTU-CVE-2021-45485.