Unspecified vulnerability in gzip 1.3.5 allows context-dependent attackers to cause a denial of service (crash) via a crafted GZIP (gz) archive, which results in a NULL dereference.
Conclusion & alert: CVE-2006-4334 is rated Moderate Risk (51.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 9.06%, 93th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 2026-04-12 | 10.43% | 9.06% | -1.37% |
| 2 | 2026-03-26 | 8.48% | 10.43% | +1.94% |
| 3 | 2026-03-02 | — | 8.48% | — |
Full EPSS history (17 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 |
|---|---|---|---|
debian
|
high | CVE-2006-4334 high priority: Debian including 1 source packages (gzip), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2006-4334 |
gentoo
|
normal | CVE-2006-4334: 1 GLSA(s) (200609-13), 1 atom(s) (app-arch/gzip); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-4334 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2006-4334 |
ubuntu
|
medium | CVE-2006-4334 medium priority: Ubuntu including 1 source packages (gzip), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2006-4334 |
Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.