CVE-2016-6354
9.8
CRITICAL · CVSS 3.0 · EPSS 8.8% (pctl 95)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 8.77% — more likely to be exploited than 95% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2016-09-21 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| westes | flex |
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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