CVE-2017-9527

Name: CVE-2017-9527
Creator: NVD / NIST
Published: 2017-06-11T17:29:00.16+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.97%

Last modified Jun 17, 2026

CVE-2017-9527 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. The mark_context_stack function in gc.c in mruby through 1.2.0 allows attackers to cause a denial of service (heap-based use-after-free and application crash) or possibly have unspecified other impact via a crafted .rb file.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

The mark_context_stack function in gc.c in mruby through 1.2.0 allows attackers to cause a denial of service (heap-based use-after-free and application crash) or possibly have unspecified other impact via a crafted .rb file.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.97%

57.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Mruby	Mruby	<= 1.2.0
Debian	Debian Linux	9.0

References

https://github.com/mruby/mruby/commit/5c114c91d4ff31859fcd84cf8bf349b737b90d99Issue Tracking, Patch, Third Party Advisory
https://github.com/mruby/mruby/issues/3486Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing List, Third Party Advisory
https://github.com/mruby/mruby/commit/5c114c91d4ff31859fcd84cf8bf349b737b90d99Issue Tracking, Patch, Third Party Advisory
https://github.com/mruby/mruby/issues/3486Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/05/msg00006.htmlMailing List, Third Party Advisory

Timeline

Published: Jun 11, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-9527?

How severe is CVE-2017-9527?

CVE-2017-9527 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2017-9527?

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-2017-9527?

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

Scan your code now

Source: NVD / NIST