CVE-2019-6293 — Vulnetix

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CVE-2019-6293 PUBLISHED

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.

EPSS 0.45% · 63.5th percentile

Risk Scores

EPSS Score

0.45%

63.5th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:18.04:LTS	flex	0, 2.6.4-1, 2.6.4-2
Ubuntu:22.04:LTS	flex	2.6.4-8build1, 0, 2.6.4-8build2
Ubuntu:16.04:LTS	flex	0, 2.5.39-8, 2.6.0-1
Ubuntu:25.10	flex	0, 2.6.4-8.2build1
Ubuntu:24.04:LTS	flex	2.6.4-8.2build1, 2.6.4-8.2, 0
Ubuntu:20.04:LTS	flex	2.6.4-6.2, 0

Timeline

Jan 15, 2019 CVE Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Aug 23, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 28, 2022 EPSS Score
Jun 29, 2022 EPSS Score
Nov 1, 2022 EPSS Score
Jan 2, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2019-6293 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2019-6293 third-party-advisory

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