The error handling in the (1) inflate and (2) inflateBack functions in ZLib compression library 1.2.x allows local users to cause a denial of service (application crash).
Conclusion & alert: CVE-2004-0797 is rated Low Risk (19.7/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.48%). Mandatory action: Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.
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 | 2026-06-15 | 2.23% | 0.48% | -1.75% |
| 2 | 2026-05-20 | 2.11% | 2.23% | +0.11% |
| 3 | 2026-03-12 | — | 2.11% | — |
Full EPSS history (16 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 2.1 | 2.0 | LOW |
|
3.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2004-0797 not yet assigned priority: Debian including 1 source packages (zlib), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2004-0797 |
gentoo
|
normal | CVE-2004-0797: 1 GLSA(s) (200408-26), 1 atom(s) (sys-libs/zlib); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2004-0797 |
ubuntu
|
medium | CVE-2004-0797 medium priority: Ubuntu including 1 source packages (zlib), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2004-0797 |