Updated: 2026-02-04 05:04:41.252146
Description:
In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | HIGH | 8.2 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| Alpine Linux 3.22 | php | 7.3 | 8.2 | HIGH | Released | CLSA-2026:1771245338 | 2026-02-16 14:41:30 | |
| Alpine Linux 3.22 | php | 7.4 | 8.2 | HIGH | Released | CLSA-2026:1769188145 | 2026-01-23 21:45:44 | |
| Alpine Linux 3.22 | php | 8.1 | 8.2 | HIGH | Released | CLSA-2026:1771348225 | 2026-02-18 17:42:42 | |
| Debian 10 | php | 8.0 | 8.2 | HIGH | Released | CLSA-2026:1768587817 | 2026-01-16 18:29:27 | |
| Debian 10 | php | 5.6 | 8.2 | HIGH | Not Vulnerable | 2026-01-16 11:14:21 | ||
| Debian 10 | php | 7.3 | 8.2 | HIGH | Released | CLSA-2026:1769025477 | 2026-01-22 04:29:11 | |
| Debian 10 | php | 8.2 | 8.2 | HIGH | Released | CLSA-2026:1768511374 | 2026-01-15 22:31:43 | |
| Debian 10 | php | 8.1 | 8.2 | HIGH | Released | CLSA-2026:1768510758 | 2026-01-15 22:31:45 | |
| Debian 10 | php | 7.0 | 8.2 | HIGH | Not Vulnerable | 2026-01-16 11:13:57 | ||
| Debian 10 | php | 7.1 | 8.2 | HIGH | Not Vulnerable | 2026-01-16 11:13:57 |