How severe is CVE-2015-8616?

CVE-2015-8616 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.

Is CVE-2015-8616 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8616?

CVE-2015-8616 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-8616?

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-2015-8616 published?

CVE-2015-8616 was published on 2016-01-19 and last updated on 2026-06-17.

CVE-2015-8616

CVE-2015-8616 is a high-severity vulnerability in Php with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Php
Published: 2016-01-19
Last modified: 2026-06-17

Description

Use-after-free vulnerability in the Collator::sortWithSortKeys function in ext/intl/collator/collator_sort.c in PHP 7.x before 7.0.1 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging the relationships between a key buffer and a destroyed array.

Frequently asked questions

What is CVE-2015-8616?: Use-after-free vulnerability in the Collator::sortWithSortKeys function in ext/intl/collator/collator_sort.c in PHP 7.x before 7.0.1 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact by leveraging the relationships between a key buffer and a destroyed array.
How severe is CVE-2015-8616?: CVE-2015-8616 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability high.
Is CVE-2015-8616 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8616?: CVE-2015-8616 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-8616?: 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-2015-8616 published?: CVE-2015-8616 was published on 2016-01-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:php:php:7.0.0:*:*:*:*:*:*:*

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