CVE-2022-4900: Potential buffer overflow in php_cli_server_startup_workers

Vulnerability summary

CVE-2022-4900 is a medium (CVSS 6.2) vulnerability in php. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 30.5% of scored vulnerabilities.

Timeline

1. 02-11-2023
   PublishedVulnerability first disclosed.
2. 03-11-2025
   Last modifiedVulnerability information updated.

Description

A vulnerability was found in PHP where setting the environment variable PHP_CLI_SERVER_WORKERS to a large value leads to a heap buffer overflow.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.