CVE-2019-6293

Name: CVE-2019-6293
Creator: NVD / NIST
Published: 2019-01-15T00:29:00.523+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.59%

Last modified Jun 17, 2026

CVE-2019-6293 is a vulnerability of currently unknown severity. An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in certain scenarios involving lots of '*' characters. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

Description

An issue was discovered in the function mark_beginning_as_normal in nfa.c in flex 2.6.4. There is a stack exhaustion problem caused by the mark_beginning_as_normal function making recursive calls to itself in certain scenarios involving lots of '*' characters. Remote attackers could leverage this vulnerability to cause a denial-of-service.

Metrics

EPSS Probability

1.59%

72.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Westes	Flex	2.6.4

References

https://github.com/westes/flex/issues/414Exploit, Third Party Advisory
https://github.com/westes/flex/issues/414Exploit, Third Party Advisory

Timeline

Published: Jan 15, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-6293?

How severe is CVE-2019-6293?

Severity scoring for CVE-2019-6293 is pending analysis. The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2019-6293?

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-2019-6293?

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

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Source: NVD / NIST