Integer overflow in the rb_ary_fill function in array.c in Ruby before revision 17756 allows context-dependent attackers to cause a denial of service (crash) or possibly have unspecified other impact via a call to the Array#fill method with a start (aka beg) argument greater than ARY_MAX_SIZE. NOTE: this issue exists because of an incomplete fix for other closely related integer overflows.
Conclusion & alert: CVE-2008-2376 is rated Moderate Risk (55.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.60%). Mandatory action: Review affected assets and schedule 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 | 2026-06-15 | 11.36% | 3.60% | -7.76% |
| 2 | 2025-12-01 | 11.27% | 11.36% | +0.09% |
| 3 | 2025-09-02 | — | 11.27% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2008-2376: 1 GLSA(s) (200812-17), 1 atom(s) (dev-lang/ruby); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2008-2376 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2008-2376 |
ubuntu
|
low | CVE-2008-2376 low priority: Ubuntu including 2 source packages (ruby1.8, ruby1.9), 24 status rows across 12 suites (dapper, feisty, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): released 10, not-affected 7, ignored 4, DNE 3. | https://ubuntu.com/security/CVE-2008-2376 |