tables/apr_hash.c in the Apache Portable Runtime (APR) library through 1.4.5 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.
Conclusion & alert: CVE-2012-0840 is rated High Exploit Risk (72.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 40.19%, 97th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.00% over the last day, indicating growing attacker interest. 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 |
|---|---|---|---|---|
| 36669 | exploit_db | edb | 2012-01-05 | 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 | 2026-05-30 | 37.18% | 40.19% | +3.00% |
| 2 | 2025-10-11 | 31.95% | 37.18% | +5.24% |
| 3 | 2025-08-26 | — | 31.95% | — |
Full EPSS history (16 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
|
low | CVE-2012-0840 low priority: Debian including 1 source packages (apr), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2012-0840 |
gentoo
|
low | CVE-2012-0840: 1 GLSA(s) (201405-24), 2 atom(s) (dev-libs/apr, dev-libs/apr-util); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-0840 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2012-0840 |
ubuntu
|
low | CVE-2012-0840 low priority: Ubuntu including 1 source packages (apr), 13 status rows across 13 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid): not-affected 7, ignored 5, released 1. | https://ubuntu.com/security/CVE-2012-0840 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| apache | portable_runtime | <= 1.4.5 | cpe:2.3:a:apache:portable_runtime:*:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.1 | cpe:2.3:a:apache:portable_runtime:0.9.1:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.2 | cpe:2.3:a:apache:portable_runtime:0.9.2:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.2-dev | cpe:2.3:a:apache:portable_runtime:0.9.2-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.3 | cpe:2.3:a:apache:portable_runtime:0.9.3:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.3-dev | cpe:2.3:a:apache:portable_runtime:0.9.3-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.4 | cpe:2.3:a:apache:portable_runtime:0.9.4:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.5 | cpe:2.3:a:apache:portable_runtime:0.9.5:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.6 | cpe:2.3:a:apache:portable_runtime:0.9.6:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.7 | cpe:2.3:a:apache:portable_runtime:0.9.7:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.7-dev | cpe:2.3:a:apache:portable_runtime:0.9.7-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.8 | cpe:2.3:a:apache:portable_runtime:0.9.8:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.9 | cpe:2.3:a:apache:portable_runtime:0.9.9:*:*:*:*:*:*:* |
| apache | portable_runtime | 0.9.16-dev | cpe:2.3:a:apache:portable_runtime:0.9.16-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.0 | cpe:2.3:a:apache:portable_runtime:1.3.0:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.1 | cpe:2.3:a:apache:portable_runtime:1.3.1:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.2 | cpe:2.3:a:apache:portable_runtime:1.3.2:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.3 | cpe:2.3:a:apache:portable_runtime:1.3.3:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.4 | cpe:2.3:a:apache:portable_runtime:1.3.4:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.4-dev | cpe:2.3:a:apache:portable_runtime:1.3.4-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.5 | cpe:2.3:a:apache:portable_runtime:1.3.5:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.6 | cpe:2.3:a:apache:portable_runtime:1.3.6:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.6-dev | cpe:2.3:a:apache:portable_runtime:1.3.6-dev:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.7 | cpe:2.3:a:apache:portable_runtime:1.3.7:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.8 | cpe:2.3:a:apache:portable_runtime:1.3.8:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.9 | cpe:2.3:a:apache:portable_runtime:1.3.9:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.10 | cpe:2.3:a:apache:portable_runtime:1.3.10:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.11 | cpe:2.3:a:apache:portable_runtime:1.3.11:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.12 | cpe:2.3:a:apache:portable_runtime:1.3.12:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.3.13 | cpe:2.3:a:apache:portable_runtime:1.3.13:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.4.0 | cpe:2.3:a:apache:portable_runtime:1.4.0:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.4.1 | cpe:2.3:a:apache:portable_runtime:1.4.1:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.4.2 | cpe:2.3:a:apache:portable_runtime:1.4.2:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.4.3 | cpe:2.3:a:apache:portable_runtime:1.4.3:*:*:*:*:*:*:* |
| apache | portable_runtime | 1.4.4 | cpe:2.3:a:apache:portable_runtime:1.4.4:*:*:*:*:*:*:* |