Updated: 2026-01-10 02:28:38.309153
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, the getimagesize() function may leak uninitialized heap memory into the APPn segments (e.g., APP1) when reading images in multi-chunk mode (such as via php://filter). This occurs due to a bug in php_read_stream_all_chunks() that overwrites the buffer without advancing the pointer, leaving tail bytes uninitialized. This may lead to information disclosure of sensitive heap data and affect the confidentiality of the target server.
| Links | NIST | CIRCL | RHEL | Ubuntu |
| Severity | Score | |
|---|---|---|
| CVSS Version 2.x | 0.0 | |
| CVSS Version 3.x | HIGH | 7.5 |
| OS name | Project name | Version | Score | Severity | Status | Errata | Last updated | Statement |
|---|---|---|---|---|---|---|---|---|
| Alpine Linux 3.22 | php | 7.3 | 7.5 | HIGH | Not Vulnerable | 2026-02-16 14:39:49 | ||
| Alpine Linux 3.22 | php | 7.4 | 7.5 | HIGH | Not Vulnerable | 2026-01-23 13:38:49 | ||
| Alpine Linux 3.22 | php | 8.1 | 7.5 | HIGH | Released | CLSA-2026:1771348225 | 2026-02-18 17:42:30 | |
| Debian 10 | php | 8.0 | 7.5 | HIGH | Not Vulnerable | 2026-01-13 13:36:16 | ||
| Debian 10 | php | 5.6 | 7.5 | HIGH | Not Vulnerable | 2026-01-13 13:36:42 | ||
| Debian 10 | php | 7.3 | 7.5 | HIGH | Not Vulnerable | 2026-01-13 13:36:17 | ||
| Debian 10 | php | 8.2 | 7.5 | HIGH | Released | CLSA-2026:1768511374 | 2026-01-15 22:30:24 | |
| Debian 10 | php | 8.1 | 7.5 | HIGH | Released | CLSA-2026:1768510758 | 2026-01-15 22:30:26 | |
| Debian 10 | php | 7.0 | 7.5 | HIGH | Not Vulnerable | 2026-01-13 13:36:18 | ||
| Debian 10 | php | 7.1 | 7.5 | HIGH | Not Vulnerable | 2026-01-13 13:36:18 |