How severe is CVE-2018-3691?

CVE-2018-3691 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2018-3691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3691?

CVE-2018-3691 affects Intel Integrated Performance Primitives Cryptography. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3691?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-3691 published?

CVE-2018-3691 was published on 2018-06-05 and last updated on 2026-06-17.

CVE-2018-3691

CVE-2018-3691 is a medium-severity vulnerability in Intel Integrated Performance Primitives Cryptography with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 1.9
EPSS exploit prediction: 0% (21st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Intel Integrated Performance Primitives Cryptography
Published: 2018-06-05
Last modified: 2026-06-17

Description

Some implementations in Intel Integrated Performance Primitives Cryptography Library before version 2018 U3.1 do not properly ensure constant execution time.

Frequently asked questions

What is CVE-2018-3691?: Some implementations in Intel Integrated Performance Primitives Cryptography Library before version 2018 U3.1 do not properly ensure constant execution time.
How severe is CVE-2018-3691?: CVE-2018-3691 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2018-3691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3691?: CVE-2018-3691 affects Intel Integrated Performance Primitives Cryptography. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3691?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-3691 published?: CVE-2018-3691 was published on 2018-06-05 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00106.html

Affected products (1)

cpe:2.3:a:intel:integrated_performance_primitives_cryptography:*:*:*:*:*:*:*:*

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