What’s Vulnerable › Vulnerabilities

CVE-2016-6354

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-09-21 · updated 2026-06-17
• Weakness: CWE-119

Description

Heap-based buffer overflow in the yy_get_next_buffer function in Flex before 2.6.1 might allow context-dependent attackers to cause a denial of service or possibly execute arbitrary code via vectors involving num_to_read.

Affected products

• Debian Linux: 8.0
• Westes Flex: through 2.6.0

References

• http://www.debian.org/security/2016/dsa-3653
• http://www.openwall.com/lists/oss-security/2016/07/18/8
• http://www.openwall.com/lists/oss-security/2016/07/26/12
• https://github.com/westes/flex/commit/a5cbe929ac3255d371e698f62dc256afe7006466
• https://security.gentoo.org/glsa/201701-31
• http://www.debian.org/security/2016/dsa-3653
• http://www.openwall.com/lists/oss-security/2016/07/18/8
• http://www.openwall.com/lists/oss-security/2016/07/26/12
• https://github.com/westes/flex/commit/a5cbe929ac3255d371e698f62dc256afe7006466
• https://security.gentoo.org/glsa/201701-31

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