CVE-2020-12658

Name: CVE-2020-12658
Creator: NVD / NIST
Published: 2020-12-31T01:15:12.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.68%

Last modified Jun 17, 2026

CVE-2020-12658 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We are already on a shutdown path when running the code in question, so a DoS there doesn't make any sense, and there has been no additional information provided us (as upstream) to indicate why this would be a problem.. EPSS estimates a 1.68% chance of exploitation in the next 30 days.

Description

gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We are already on a shutdown path when running the code in question, so a DoS there doesn't make any sense, and there has been no additional information provided us (as upstream) to indicate why this would be a problem.

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

1.68%

74.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-667

Affected Software

Vendor	Product	Versions
Gssproxy Project	Gssproxy	< 0.8.3
Debian	Debian Linux	9.0

References

https://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003Patch, Third Party Advisory
https://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00004.htmlMailing List, Third Party Advisory
https://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=masterThird Party Advisory
https://github.com/gssapi/gssproxy/commit/cb761412e299ef907f22cd7c4146d50c8a792003Patch, Third Party Advisory
https://github.com/gssapi/gssproxy/compare/v0.8.2...v0.8.3Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/01/msg00004.htmlMailing List, Third Party Advisory
https://pagure.io/gssproxy/c/cb761412e299ef907f22cd7c4146d50c8a792003?branch=masterThird Party Advisory

Timeline

Published: Dec 31, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-12658?

How severe is CVE-2020-12658?

CVE-2020-12658 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.68% probability of exploitation in the next 30 days.

How do I fix CVE-2020-12658?

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-2020-12658?

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

Scan your code now

Source: NVD / NIST