nettle: secp256 calculation bug
Published Feb 23, 2016
9.8
CRITICALCVSS 3.0
EPSS 4.21%
Description
The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8805.
Affected products
No data.
Configuration 1
- ≤ 3.1.1
Configuration 2
- 14.04
- 15.10
- 42.1
- 13.1
- 13.2
No data.
Red Hat Enterprise Linux 7
nettle-0:2.7.1-8.el7
Fixed · RHSA-2016:2582
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | nettle-0:2.7.1-8.el7 | Fixed | RHSA-2016:2582 |
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:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 | 4.21% (0.04212) | 90.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.13% (0.04132) | 89.48th | v5 (v2026.06.15) |
| Jul 9, 2025 | 12.34% (0.12343) | 93.56th | v4 (v2025.03.14) |
| Mar 30, 2025 | 9.86% (0.09863) | 92.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 18.75% (0.18750) | 92.24th | v4 (v2025.03.14) |
| Mar 17, 2025 | 9.86% (0.09863) | 92.42th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.11% (0.01108) | 85.14th | v3 (v2023.03.01) |
| Mar 21, 2024 | 0.87% (0.00872) | 82.03th | v3 (v2023.03.01) |
| Apr 17, 2023 | 0.87% (0.00872) | 80.03th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.77% (0.00773) | 78.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (18)
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html vendor-advisoryx_refsource_SUSE
- http://rhn.redhat.com/errata/RHSA-2016-2582.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/02/02/2 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2016/02/03/1 mailing-listx_refsource_MLIST
- http://www.ubuntu.com/usn/USN-2897-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2015-8803 Vendor Advisory
- https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=1304303 Issue Tracking
- https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d x_refsource_CONFIRMPatch
- https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html mailing-listx_refsource_MLIST
- https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html mailing-listx_refsource_MLISTVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-8803
- https://www.cve.org/CVERecord?id=CVE-2015-8803
Change history (0)
No recorded changes yet.