Critical
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-5114
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:10 UTC · Revision 1
Source evidence
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.
osv:CVE-2016-5114
Complete source record
{
"id": "601f099346fb173694e1b64f12abe30a41c852915b599adfdd4319d28694da9a",
"url": "https://osv.dev/vulnerability/CVE-2016-5114",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-5114",
"summary": "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.",
"evidence": "osv:CVE-2016-5114",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2016-5114",
"aliases": [
"CVE-2016-5114"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/php/php-src",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
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},
{
"introduced": "8648f76bac2f78391a1539253f21d62f53d83022"
},
{
"last_affected": "4054ec69da7631046f19d54ab06f09728a208b8b"
},
{
"fixed": "2721a0148649e07ed74468f097a28899741eb58f"
}
],
"database_specific": {
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{
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{
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}
],
"source": "CPE_RANGE"
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{
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{
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},
{
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}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.0:alpha2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-alpha2"
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{
"last_affected": "5.6.0-alpha2"
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],
"source": "CPE_STRING"
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{
"cpe": "cpe:2.3:a:php:php:5.6.0:alpha3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-alpha3"
},
{
"last_affected": "5.6.0-alpha3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.0:beta1:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-beta1"
},
{
"last_affected": "5.6.0-beta1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.0:beta2:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-beta2"
},
{
"last_affected": "5.6.0-beta2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.0:beta3:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-beta3"
},
{
"last_affected": "5.6.0-beta3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.0:beta4:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0-beta4"
},
{
"last_affected": "5.6.0-beta4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.1"
},
{
"last_affected": "5.6.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.2"
},
{
"last_affected": "5.6.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.3"
},
{
"last_affected": "5.6.3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.4"
},
{
"last_affected": "5.6.4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.5:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.5"
},
{
"last_affected": "5.6.5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.6:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.6"
},
{
"last_affected": "5.6.6"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.7:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.7"
},
{
"last_affected": "5.6.7"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.8:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.8"
},
{
"last_affected": "5.6.8"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.9:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.9"
},
{
"last_affected": "5.6.9"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.10:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.10"
},
{
"last_affected": "5.6.10"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.11:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.11"
},
{
"last_affected": "5.6.11"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.12:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.12"
},
{
"last_affected": "5.6.12"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.13:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.13"
},
{
"last_affected": "5.6.13"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.14:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.14"
},
{
"last_affected": "5.6.14"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.15:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.15"
},
{
"last_affected": "5.6.15"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:5.6.16:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.16"
},
{
"last_affected": "5.6.16"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.0"
},
{
"last_affected": "7.0.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:php:php:7.0.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "7.0.1"
},
{
"last_affected": "7.0.1"
}
],
"source": "CPE_STRING"
},
{
"range": [
{
"fixed": "2721a0148649e07ed74468f097a28899741eb58f"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"5.6.0-alpha2",
"5.6.0-alpha3",
"5.6.0-beta1",
"5.6.0-beta2",
"5.6.0-beta3",
"5.6.0-beta4",
"5.6.1",
"5.6.10",
"5.6.11",
"5.6.12",
"5.6.13",
"5.6.14",
"5.6.15",
"5.6.16",
"5.6.2",
"5.6.3",
"5.6.4",
"5.6.5",
"5.6.6",
"5.6.7",
"5.6.8",
"5.6.9",
"7.0.0",
"7.0.1",
"php-7.0.2RC1",
"php-7.0.1",
"php-7.0.1RC1",
"php-5.5.30",
"POST_PHP7_NSAPI_REMOVAL",
"PRE_PHP7_NSAPI_REMOVAL",
"PRE_PHP7_EREG_MYSQL_REMOVALS",
"PRE_PHP7_REMOVALS",
"POST_PHP7_REMOVALS",
"POST_AST_MERGE",
"PRE_AST_MERGE",
"POST_64BIT_BRANCH_MERGE",
"PRE_64BIT_BRANCH_MERGE",
"POST_PHPNG_MERGE"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-5114.json",
"vanir_signatures": [
{
"id": "CVE-2016-5114-2b4d9166",
"digest": {
"threshold": 0.9,
"line_hashes": [
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},
"source": "https://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f",
"target": {
"file": "sapi/fpm/fpm/fpm_log.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2016-5114-e692c715",
"digest": {
"length": 7950,
"function_hash": "18497476000700736301362621056643006825"
},
"source": "https://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f",
"target": {
"file": "sapi/fpm/fpm/fpm_log.c",
"function": "fpm_log_write"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:15:23Z"
}
}
],
"modified": "2026-10-20T13:15:23.715046918Z",
"provider": "osv",
"references": [
"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731",
"https://bugs.php.net/bug.php?id=70755"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:php:php:5.6.0:alpha4:*:*:*:*:*:*",
"cpe:2.3:a:php:php:5.6.0:alpha5:*:*:*:*:*:*"
],
"vendor_product": "php:php",
"extracted_events": [
{
"range": [
{
"introduced": "5.6.0-alpha4"
},
{
"last_affected": "5.6.0-alpha4"
},
{
"introduced": "5.6.0-alpha5"
},
{
"last_affected": "5.6.0-alpha5"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-5114",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 387399,
"published_at": "2016-08-07T10:59:10.947+00:00"
}