How severe is CVE-2017-15031?

CVE-2017-15031 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-15031 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15031?

CVE-2017-15031 affects Trustedfirmware Trusted Firmware-a. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15031?

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

When was CVE-2017-15031 published?

CVE-2017-15031 was published on 2018-12-18 and last updated on 2026-06-17.

CVE-2017-15031

CVE-2017-15031 is a high-severity vulnerability in Trustedfirmware Trusted Firmware-a with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Trustedfirmware Trusted Firmware-a
Published: 2018-12-18
Last modified: 2026-06-17

Description

In all versions of ARM Trusted Firmware up to and including v1.4, not initializing or saving/restoring the PMCR_EL0 register can leak secure world timing information.

Frequently asked questions

What is CVE-2017-15031?: In all versions of ARM Trusted Firmware up to and including v1.4, not initializing or saving/restoring the PMCR_EL0 register can leak secure world timing information.
How severe is CVE-2017-15031?: CVE-2017-15031 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-15031 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15031?: CVE-2017-15031 affects Trustedfirmware Trusted Firmware-a. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15031?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-15031 published?: CVE-2017-15031 was published on 2018-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:trustedfirmware:trusted_firmware-a:*:*:*:*:*:*:*:*

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