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.

Category

3.5
CVSS
Severity: Low
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.01%
Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4 release notes vendor advisory
https://arxiv.org/pdf/2112.09604.pdf third party advisory technical description
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4/route.c?id=aa6dd211e4b1dde9d5dc25d699d35f789ae7eeba patch vendor advisory
https://www.oracle.com/security-alerts/cpujul2022.html third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-45486?
CVE-2021-45486 has been scored as a low severity vulnerability.
How to fix CVE-2021-45486?
To fix CVE-2021-45486, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-45486 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-45486 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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