CVE catalog
CVE-2006-0459
flex: CVE-2006-0459
- Severity
- Medium
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 4.71% · Oct 25, 2026
flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing (1) REJECT statements or (2) trailing context rules, which causes flex to generate code that contains a buffer overflow that might allow context-dependent attackers to execute arbitrary code.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | flex | sid | 2.6.4-8.2 | fixed |
| Debian | flex | forky | 2.6.4-8.2 | fixed |
| Debian | flex | trixie | 2.6.4-8.2 | fixed |
| Debian | flex | bookworm | 2.6.4-8.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | flex | source | sid | 2.5.33-1 | not yet assigned | Not reported | Not reported |
| Debian | flex | source | forky | 2.5.33-1 | not yet assigned | Not reported | Not reported |
| Debian | flex | source | trixie | 2.5.33-1 | not yet assigned | Not reported | Not reported |
| Debian | flex | source | bookworm | 2.5.33-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [flex]Fixed
Details (2)
2.6.4-8.2· amd64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
2.6.4-8.2· arm64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
- [flex-doc]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2· all · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
2.6.4-8.2· all · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
- [libfl2]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2· amd64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
2.6.4-8.2· arm64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
- [libfl-dev]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2· amd64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
2.6.4-8.2· arm64 · bookwormFixed · Fixed:
2.5.33-1dsa · flex · debian · bookworm; dsa · flex · debian · 12
[Debian 13 (Trixie)]
- [flex]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2+b4· amd64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
2.6.4-8.2+b4· arm64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
- [flex-doc]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2· all · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
2.6.4-8.2· all · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
- [libfl2]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2+b4· amd64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
2.6.4-8.2+b4· arm64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
- [libfl-dev]Fixed
Source package: [flex]
Details (2)
2.6.4-8.2+b4· amd64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
2.6.4-8.2+b4· arm64 · trixieFixed · Fixed:
2.5.33-1dsa · flex · debian · 13
Observed: