CVE-2018-21027

Name: CVE-2018-21027
Creator: NVD / NIST
Published: 2019-10-11T20:15:16.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.35%

Last modified Jun 17, 2026

CVE-2018-21027 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.. EPSS estimates a 2.35% chance of exploitation in the next 30 days.

Description

Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.35%

81.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Boa	Boa	<= 0.94.14.21

References

https://github.com/gpg/boa/pull/1Third Party Advisory
https://github.com/gpg/boa/pull/1/commits/e139b87835994d007fbd64eead6c1455d7b8cf4ePatch, Third Party Advisory
https://github.com/gpg/boa/pull/1Third Party Advisory
https://github.com/gpg/boa/pull/1/commits/e139b87835994d007fbd64eead6c1455d7b8cf4ePatch, Third Party Advisory

Timeline

Published: Oct 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-21027?

Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.

How severe is CVE-2018-21027?

CVE-2018-21027 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.35% probability of exploitation in the next 30 days.

How do I fix CVE-2018-21027?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-21027?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST