CVE-2020-35198

Name: CVE-2020-35198
Creator: NVD / NIST
Published: 2021-05-12T11:15:07.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.44%

Last modified Jun 17, 2026

CVE-2020-35198 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in Wind River VxWorks 7. The memory allocator has a possible integer overflow in calculating a memory block's size to be allocated by calloc(). EPSS estimates a 2.44% chance of exploitation in the next 30 days.

Description

An issue was discovered in Wind River VxWorks 7. The memory allocator has a possible integer overflow in calculating a memory block's size to be allocated by calloc(). As a result, the actual memory allocated is smaller than the buffer size specified by the arguments, leading to memory corruption.

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

2.44%

82.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-190

Affected Software

Vendor	Product	Versions
Windriver	Vxworks	>= 6.9, < 6.9.4.12
Windriver	Vxworks	>= 7.0, < 21.03
Windriver	Vxworks	6.9.4.12
Oracle	Communications Eagle	>= 46.8.0, <= 46.8.2
Oracle	Communications Eagle	>= 46.9.1, <= 46.9.3
Oracle	Communications Eagle	46.7.0

References

https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2020-35198Vendor Advisory
https://support2.windriver.com/index.php?page=security-noticesVendor Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2020-35198Vendor Advisory
https://support2.windriver.com/index.php?page=security-noticesVendor Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory

Timeline

Published: May 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35198?

How severe is CVE-2020-35198?

CVE-2020-35198 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.44% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35198?

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-2020-35198?

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

Scan your code now

Source: NVD / NIST