regex/v4/perl_matcher_non_recursive.hpp in the Boost regex library (aka Boost.Regex) in Boost 1.33 and 1.34 allows context-dependent attackers to cause a denial of service (failed assertion and crash) via an invalid regular expression.
Conclusion & alert: CVE-2008-0171 is rated High Exploit Risk (63.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.69%). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 3.41% | 2.69% | -0.72% |
| 2 | 2026-02-11 | 3.00% | 3.41% | +0.41% |
| 3 | 2025-03-30 | — | 3.00% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2008-0171: 1 GLSA(s) (200802-08), 1 atom(s) (dev-libs/boost); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2008-0171 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2008-0171 |
suse
|
medium | CVE-2008-0171 severity moderate: SUSE including 184 source package names (boost-devel-1.36.0-12.6.49, boost-devel-32bit-1.36.0-12.6.49, …), 381 product×package rows across 20 product lines (SUSE Linux Enterprise Module for HPC 15 SP2, SUSE Linux Enterprise Module for Legacy 15 SP2, … (20 product lines)): Fixed 380, Known Not Affected 1. | https://www.suse.com/security/cve/CVE-2008-0171/ |
ubuntu
|
low | CVE-2008-0171 low priority: Ubuntu including 1 source packages (boost), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 4, needs-triage 1. | https://ubuntu.com/security/CVE-2008-0171 |
This issue did not affect the version of boost as shipped with Red Hat Enterprise Linux 4. For Red Hat Enterprise Linux 5, Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2008-0171 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.