What’s Vulnerable › Vulnerabilities

CVE-2019-3561

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-04-29 · updated 2026-06-17
• Weakness: CWE-119

Description

Insufficient boundary checks for the strrpos and strripos functions allow access to out-of-bounds memory. This affects all supported versions of HHVM (4.0.3, 3.30.4, and 3.27.7 and below).

Affected products

• Facebook HHVM: through 3.27.7; from 3.28.0 through 3.30.4; from 4.0.0 through 4.0.3

References

• https://github.com/facebook/hhvm/commit/46003b4ab564b2abcd8470035fc324fe36aa8c75
• https://hhvm.com/blog/2019/04/03/hhvm-4.0.4.html
• https://github.com/facebook/hhvm/commit/46003b4ab564b2abcd8470035fc324fe36aa8c75
• https://hhvm.com/blog/2019/04/03/hhvm-4.0.4.html

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