Medium
Security advisory
The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-6313
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:14 UTC · Revision 1
Source evidence
The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.
osv:CVE-2016-6313
Complete source record
{
"id": "625b19b21831bc3aaa7f5c1b20aeddd762eac68a26fc266886d6fda0aea9a3bb",
"url": "https://osv.dev/vulnerability/CVE-2016-6313",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-6313",
"summary": "The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.",
"evidence": "osv:CVE-2016-6313",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2016-6313",
"aliases": [
"CVE-2016-6313"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "git://git.gnupg.org/libgcrypt.git",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "a3eabcb6e97a88031f8fd56b7b650447cdda4206"
},
{
"introduced": "0ea9731e1c93a962f6266004ab0e7418c19d6277"
},
{
"last_affected": "be0bec7d9208b2f2d2ffce9cc2ca6154853e7e59"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.5.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.0"
},
{
"last_affected": "1.6.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.1"
},
{
"last_affected": "1.6.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.2"
},
{
"last_affected": "1.6.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.3"
},
{
"last_affected": "1.6.3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.4"
},
{
"last_affected": "1.6.4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.5:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.5"
},
{
"last_affected": "1.6.5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.0"
},
{
"last_affected": "1.7.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.1"
},
{
"last_affected": "1.7.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.2"
},
{
"last_affected": "1.7.2"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"1.6.0",
"1.6.1",
"1.6.2",
"1.6.3",
"1.6.4",
"1.6.5",
"1.7.0",
"1.7.1",
"1.7.2",
"libgcrypt-1.7.2",
"libgcrypt-1.7.1",
"libgcrypt-1.7.0",
"libgcrypt-1.6.0",
"libgcrypt-1.5.3",
"libgcrypt-1.5.2",
"libgcrypt-1.5.1",
"libgcrypt-1.5.0",
"libgcrypt-1.5.0-beta1",
"post-nuke-of-trailing-ws",
"ecc-integration-done",
"libgcrypt-1.4.4",
"libgcrypt-1.4.3",
"libgcrypt-1.4.2",
"libgcrypt-1.4.2rc2",
"libgcrypt-1.4.2rc1",
"libgcrypt-1.4.1",
"libgcrypt-1.4.1rc1",
"libgcrypt-1.4.0",
"libgcrypt-1.3.2",
"libgcrypt-1.3.1",
"libgcrypt-1.3.0",
"V1-2-1",
"V1-2-0",
"V1-1-94",
"marcus-after-thread-cbs",
"marcus-before-thread-cbs",
"V1-1-93",
"V1-1-92",
"V1-1-91",
"V1-1-90",
"V1-1-44",
"V1-1-43",
"V1-1-42",
"V1-1-12",
"V1-1-11",
"V1-1-10",
"V1-1-9",
"V1-1-8",
"V1-1-7",
"now-less-freedom-protected",
"last-gpl-version",
"V1-1-6",
"V1-1-5",
"V1-1-4",
"V1-1-3",
"V1-1-2",
"V1-1-0",
"DEVEL-BRANCH-1-1",
"V1-0-0",
"V0-9-11",
"V0-9-10",
"V0-9-9",
"V0-9-8",
"V0-9-7",
"V0-9-6",
"V0-9-5",
"V0-9-4",
"V1-0-4",
"V1-0-3",
"V1-0-2",
"V1-0-1-ePit-1",
"V1-0-1",
"V0-9-3",
"V0-9-2",
"V0-9-1",
"V0-9-0",
"V0-4-5",
"V0-4-4",
"V0-4-3",
"V0-4-2",
"V0-4-1",
"V0-4-0",
"V0-3-5",
"V0-3-4",
"V0-3-3",
"V0-3-2",
"V0-3-1",
"V0-3-0",
"V0-2-19",
"V0-2-18",
"V0-2-17",
"V0-2-15",
"V0-2-10",
"V-0-2-8",
"V0-2-6",
"V0-2-0",
"V0-1-0",
"V0-0-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6313.json"
}
},
{
"ranges": [
{
"repo": "https://github.com/gpg/libgcrypt",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "a3eabcb6e97a88031f8fd56b7b650447cdda4206"
},
{
"introduced": "0ea9731e1c93a962f6266004ab0e7418c19d6277"
},
{
"last_affected": "be0bec7d9208b2f2d2ffce9cc2ca6154853e7e59"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.5.3"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.0"
},
{
"last_affected": "1.6.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.1"
},
{
"last_affected": "1.6.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.2"
},
{
"last_affected": "1.6.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.3"
},
{
"last_affected": "1.6.3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.4"
},
{
"last_affected": "1.6.4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.6.5:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.6.5"
},
{
"last_affected": "1.6.5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.0:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.0"
},
{
"last_affected": "1.7.0"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.1"
},
{
"last_affected": "1.7.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:gnupg:libgcrypt:1.7.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.7.2"
},
{
"last_affected": "1.7.2"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"1.6.0",
"1.6.1",
"1.6.2",
"1.6.3",
"1.6.4",
"1.6.5",
"1.7.0",
"1.7.1",
"1.7.2",
"libgcrypt-1.7.2",
"libgcrypt-1.7.1",
"libgcrypt-1.7.0",
"libgcrypt-1.6.0",
"libgcrypt-1.5.3",
"libgcrypt-1.5.2",
"libgcrypt-1.5.1",
"libgcrypt-1.5.0",
"libgcrypt-1.5.0-beta1",
"post-nuke-of-trailing-ws",
"ecc-integration-done",
"libgcrypt-1.4.4",
"libgcrypt-1.4.3",
"libgcrypt-1.4.2",
"libgcrypt-1.4.2rc2",
"libgcrypt-1.4.2rc1",
"libgcrypt-1.4.1",
"libgcrypt-1.4.1rc1",
"libgcrypt-1.4.0",
"libgcrypt-1.3.2",
"libgcrypt-1.3.1",
"libgcrypt-1.3.0",
"V1-2-1",
"V1-2-0",
"V1-1-94",
"marcus-after-thread-cbs",
"marcus-before-thread-cbs",
"V1-1-93",
"V1-1-92",
"V1-1-91",
"V1-1-90",
"V1-1-44",
"V1-1-43",
"V1-1-42",
"V1-1-12",
"V1-1-11",
"V1-1-10",
"V1-1-9",
"V1-1-8",
"V1-1-7",
"now-less-freedom-protected",
"last-gpl-version",
"V1-1-6",
"V1-1-5",
"V1-1-4",
"V1-1-3",
"V1-1-2",
"V1-1-0",
"DEVEL-BRANCH-1-1",
"V1-0-0",
"V0-9-11",
"V0-9-10",
"V0-9-9",
"V0-9-8",
"V0-9-7",
"V0-9-6",
"V0-9-5",
"V0-9-4",
"V1-0-4",
"V1-0-3",
"V1-0-2",
"V1-0-1-ePit-1",
"V1-0-1",
"V0-9-3",
"V0-9-2",
"V0-9-1",
"V0-9-0",
"V0-4-5",
"V0-4-4",
"V0-4-3",
"V0-4-2",
"V0-4-1",
"V0-4-0",
"V0-3-5",
"V0-3-4",
"V0-3-3",
"V0-3-2",
"V0-3-1",
"V0-3-0",
"V0-2-19",
"V0-2-18",
"V0-2-17",
"V0-2-15",
"V0-2-10",
"V-0-2-8",
"V0-2-6",
"V0-2-0",
"V0-1-0",
"V0-0-0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6313.json"
}
}
],
"modified": "2026-10-24T10:30:50.528377286Z",
"provider": "osv",
"references": [
"https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWS",
"https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.html",
"https://security.gentoo.org/glsa/201610-04",
"https://security.gentoo.org/glsa/201612-01"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:gnupg:gnupg:*:*:*:*:*:*:*:*"
],
"vendor_product": "gnupg:gnupg",
"extracted_events": [
{
"range": [
{
"last_affected": "1.4.14"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
"last_affected": "12.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
],
"source": "CPE_STRING"
}
]
},
{
"cpes": [
"cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
],
"vendor_product": "debian:debian_linux",
"extracted_events": [
{
"range": [
{
"introduced": "8.0"
},
{
"last_affected": "8.0"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-6313",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 437255,
"published_at": "2016-12-13T20:59:04.267+00:00"
}