libgcrypt: PRNG output is predictable
Published Dec 13, 2016
5.3
MEDIUMCVSS 3.0
EPSS 3.60%
Description
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.
Affected products
No data.
Configuration 1
- ≤ 1.5.3
- 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
Configuration 2
- 8.0
Configuration 3
- 12.04
- 14.04
- 16.04
No data.
Red Hat Enterprise Linux 6
libgcrypt-0:1.4.5-12.el6_8
Fixed · RHSA-2016:2674
Red Hat Enterprise Linux 7
libgcrypt-0:1.5.3-13.el7_3.1
Fixed · RHSA-2016:2674
Red Hat Enterprise Linux 5
libgcrypt
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | libgcrypt-0:1.4.5-12.el6_8 | Fixed | RHSA-2016:2674 |
| Red Hat Enterprise Linux 7 | libgcrypt-0:1.5.3-13.el7_3.1 | Fixed | RHSA-2016:2674 |
| Red Hat Enterprise Linux 5 | libgcrypt | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.60% (0.03597) | 89.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.53% (0.03529) | 87.71th | v5 (v2026.06.15) |
| Jul 13, 2025 | 3.48% (0.03477) | 87.05th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.35% (0.01349) | 78.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.72% (0.00716) | 81.18th | v3 (v2023.03.01) |
| Apr 17, 2024 | 0.72% (0.00716) | 80.27th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.72% (0.00716) | 78.27th | v3 (v2023.03.01) |
| Mar 19, 2023 | 0.69% (0.00694) | 77.12th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.98% (0.00982) | 81.12th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (15)
- http://rhn.redhat.com/errata/RHSA-2016-2674.html vendor-advisoryx_refsource_REDHAT
- http://www.debian.org/security/2016/dsa-3649 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.debian.org/security/2016/dsa-3650 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.securityfocus.com/bid/92527 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1036635 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-3064-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-3065-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-6313 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1366105 Issue Tracking
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=blob_plain%3Bf=NEWS x_refsource_CONFIRM
- https://lists.gnupg.org/pipermail/gnupg-announce/2016q3/000395.html mailing-listx_refsource_MLISTMailing ListVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-6313
- https://security.gentoo.org/glsa/201610-04 vendor-advisoryx_refsource_GENTOO
- https://security.gentoo.org/glsa/201612-01 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-6313
Change history (0)
No recorded changes yet.