What is CVE-2021-3100?

CVE-2021-3100 is a high-severity vulnerability in Amazon Log4jhotpatch, classified under CWE-250. CVSS score: 8.8/10. Published 2022-04-19.

How severe is CVE-2021-3100?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Amazon Log4jhotpatch

CVE-2021-3100

The Apache Log4j hotpatch package before log4j-cve-2021-44228-hotpatch-1.1-13 didn’t mimic the permissions of the JVM being patched, allowing it to escalate privileges.

Published 2022-04-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Amazon Log4jhotpatch
Amazon Web Services Log4j-Cve-2021-44228-Hotpatch — versions unspecified
Linux Kernel

Weakness classification (CWE)

References

alas.aws.amazon.com/AL2/ALAS-2021-1732.html (Vendor Advisory)
alas.aws.amazon.com/ALAS-2021-1554.html (Vendor Advisory)
unit42.paloaltonetworks.com/aws-log4shell-hot-patch-vulnerabilities (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3100?: CVE-2021-3100 is a high-severity vulnerability in Amazon Log4jhotpatch, classified under CWE-250. CVSS score: 8.8/10. Published 2022-04-19.
How severe is CVE-2021-3100?: High severity. CVSS v3 base score is 8.8 out of 10.