CVE-2012-0031

MEDIUMCVSS v2 · 4.64.6—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.6 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:L/Au:N/C:P/I:P/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 2.9% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Elevated
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS v2: 4.6Exploit: Elevated riskExposed: 0

A fix is available — apply it.

scoreboard.c in the Apache HTTP Server 2.2.21 and earlier might allow local users to cause a denial of service (daemon crash during shutdown) or possibly have unspecified other impact by modifying a certain type field within a scoreboard shared memory segment, leading to an invalid call to the free function.

CVSS v2.0 (legacy)
4.6MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
4.6(low)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity46% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
86%
KEV
Not listed

Published

January 18, 2012

Last Modified

April 29, 2026

References (82)

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuapache2.2-common (2.2.14-5ubuntu8.8) @ lucid2026-05-29ubuntu
redhathttpd-0:2.2.17-15.4.ep5.el62012-05-07redhat
redhatpatch2012-05-07redhat
redhathttpd-0:2.2.3-63.el5_8.12012-02-21redhat
redhathttpd-0:2.2.15-15.el6_2.12012-02-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
apache2—2.2.22-1—
Debian:5.0(1)
PackageVulnerable rangeFixed inDependents
apache22.2.9-10+lenny10 ... 2.2.9-10+lenny9 (10 versions)2.2.9-10+lenny12—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
apache22.2.16-6 ... 2.2.16-6+squeeze4~bpo50+1 (8 versions)2.2.16-6+squeeze6—

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-08-27 14:20 UTCEPSS rescore
  2. 2026-08-26 14:40 UTCEPSS rescore
  3. 2026-08-24 08:28 UTCOSV refresh
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  25. 2026-07-22 21:48 UTCEG score recompute
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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-41768
    First seen Jan 11, 2012

    Apache 2.2 - Scoreboard Invalid Free On Shutdown

    Open source ↗

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2012-0031?
CVE-2012-0031 is a medium vulnerability published on January 18, 2012. scoreboard.c in the Apache HTTP Server 2.2.21 and earlier might allow local users to cause a denial of service (daemon crash during shutdown) or possibly have unspecified other impact by modifying a certain type field within a scoreboard shared memory segment, leading to an invalid call to the free…
When was CVE-2012-0031 disclosed?
CVE-2012-0031 was first published in the National Vulnerability Database on January 18, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2012-0031 actively exploited?
CVE-2012-0031 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 14.0% of all scored CVEs.
How do I remediate CVE-2012-0031?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-0031, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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