How severe is CVE-2015-8804?

CVE-2015-8804 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-8804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8804?

CVE-2015-8804 primarily affects Nettle Project Nettle. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-8804?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-8804 published?

CVE-2015-8804 was published on 2016-02-23 and last updated on 2026-06-17.

CVE-2015-8804

CVE-2015-8804 is a critical-severity vulnerability in Nettle Project Nettle with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-254.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-254
Affected product: Nettle Project Nettle
Published: 2016-02-23
Last modified: 2026-06-17

Description

x86_64/ecc-384-modp.asm in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-384 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors.

Frequently asked questions

What is CVE-2015-8804?: x86_64/ecc-384-modp.asm in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-384 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors.
How severe is CVE-2015-8804?: CVE-2015-8804 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-8804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8804?: CVE-2015-8804 primarily affects Nettle Project Nettle. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-8804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-8804 published?: CVE-2015-8804 was published on 2016-02-23 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:a:nettle_project:nettle:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

More vulnerabilities in Nettle Project Nettle

CVE-2023-36660 — Critical (CVSS 9.8): The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory corruption.
CVE-2015-8805 — Critical (CVSS 9.8): The ecc_256_modq function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces…
CVE-2015-8803 — Critical (CVSS 9.8): The ecc_256_modp function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces…
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