CVE-2021-45486 Information disclosure in n/a

What is CVE-2021-45486?

CVE-2021-45486 is a low-severity vulnerability in Linux kernel, published on 25 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-327

Which versions are affected by CVE-2021-45486?

It affects 4 products.

Products include Linux kernel, Oracle Communications Cloud Native Core Binding Support Function, Oracle Communications Cloud Native Core Network Exposure Function, Oracle Communications Cloud Native Core Policy.

How do I fix CVE-2021-45486?

Upgrade to a fixed version.

Is CVE-2021-45486 being exploited?

There is no known exploitation of CVE-2021-45486 in the wild and no public exploit code.

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-7098, DEBIAN-CVE-2021-45486, GHSA-jr67-68pw-5xqf, UBUNTU-CVE-2021-45486.