CVE-2016-5114

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4.5%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
47
EG Risk 47/100CISA SSVC

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
Severity91% × 45%
Exploitation4% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
4.5%
EPSS %ILE
91st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 7, 2016

Last Modified

June 17, 2026

Advisory Details (7)

Auto-updated Aug 1, 2026
Patch available. Sources: github_commit.
generic

PHP: PHP 5 ChangeLog

http://php.net/ChangeLog-5.php
github_commit

commit 2721a0148649 (php/php-src)

Fix landed in php/php-src commit 2721a0148649 — awaiting tagged release

http://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f?w=1
generic
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
generic

PHP :: Sec Bug #70755 :: fpm_log.c memory leak and buffer overflow

https://bugs.php.net/bug.php?id=70755
generic

oss-security - Re: Fwd: PHP-FPM fpm_log.c memory leak and buffer overflow

http://www.openwall.com/lists/oss-security/2016/05/29/1
generic
http://rhn.redhat.com/errata/RHSA-2016-2750.html
generic

PHP: PHP 7 ChangeLog

http://php.net/ChangeLog-7.php

Vendor Advisories for CVE-2016-5114(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuphp5-xsl (5.5.9+dfsg-1ubuntu4.19) @ trusty2026-05-22ubuntu
redhatrh-php56-php-pear-1:1.9.5-4.el72016-11-15redhat

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

(1 across 1 ecosystem)
Debian:7(1)
PackageVulnerable rangeFix by version rangeDependents
php55.4.11-1 ... 5.4.9-4 (39 versions)
  • every version up to 5.4.45-0+deb7u5: fixed in 5.4.45-0+deb7u5
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 20× 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 155 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2016-5114?
CVE-2016-5114 is a critical vulnerability published on August 7, 2016. sapi/fpm/fpm/fpmlog.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long…
When was CVE-2016-5114 disclosed?
CVE-2016-5114 was first published on August 7, 2016, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-5114 actively exploited?
CVE-2016-5114 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.5% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2016-5114?
CVE-2016-5114 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2016-5114?
A fix for CVE-2016-5114 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2016-5114 are linked in the Vendor Advisories panel on this page.

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