CVE-2021-45486

low-risk
Published 2021-12-25

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.

Do I need to act?

-
0.08% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.5/10 Low
ADJACENT_NETWORK / LOW complexity

Affected Products (4)

Affected Vendors

Linux Oracle

References (8)

Technical Description https://arxiv.org/pdf/2112.09604.pdf
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
Patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4...
Patch https://www.oracle.com/security-alerts/cpujul2022.html
Technical Description https://arxiv.org/pdf/2112.09604.pdf
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.4
Patch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/net/ipv4...
Patch https://www.oracle.com/security-alerts/cpujul2022.html
23
/ 100
low-risk
Severity 13/34 · Low
Exploitability 0/34 · Minimal
Exposure 10/34 · Low