Description
The i_zval_ptr_dtor function in Zend/zend_variables.h in PHP 7.1.5 allows attackers to cause a denial of service (memory consumption and application crash) or possibly have unspecified other impact by triggering crafted operations on array data structures.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | php7.4 | 7.4.3-4ubuntu2.10 | USN-5300-2 |
| Ubuntu 18.04 LTS | php7.2 | 7.2.24-0ubuntu0.18.04.11 | USN-5300-2 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | php7.0 | 7.0.33-0ubuntu0.16.04.16+esm3 | USN-5300-1 |
| Ubuntu Pro 14.04 LTS | php5 | No fix yet | — |
Advisories 2
- USN-5300-1 php7.0 vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5300-2 php7.2, php7.4 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026