# CVE-2026-40660: AMD Compressonator SDK heap-based out-of-bounds read

Source: https://junglewise.ai/threats/cve-2026-40660-a-heap-based-out-of-bounds-oob-read-vulnerability-in-the-amd  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-40660 · Severity: info · Published 2026-11-03

AMD Compressonator SDK is a compression and decompression tool used in graphics applications and development pipelines. A heap memory flaw allows a local attacker to read sensitive data from memory or crash the application, potentially exposing confidential information used by the software.

Technologies: [Amd Compressonator SDK](https://junglewise.ai/threats/technologies/compressonator-sdk). Vendors: [Amd](https://junglewise.ai/threats/vendors/amd).

## Quick answers

**Is CVE-2026-40660 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40660 being exploited in the wild.

**How severe is CVE-2026-40660?** Informational severity, published 3 November 2026.

**Which products and versions are affected?** AMD Compressonator SDK.

**Is there a fix for CVE-2026-40660?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-40660 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-40660?** Check whether you run Amd Compressonator SDK. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based out-of-bounds read vulnerability in the AMD Compressonator SDK allows an attacker with local access to read beyond allocated heap memory boundaries. This can result in information disclosure of sensitive data stored on the heap or trigger an application crash (denial of service). The vulnerability requires local access and is not remotely exploitable.

## Affected products

- AMD Compressonator SDK

## References

- [https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6032.html](https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6032.html)

## Related threats

- [AMD Compressonator SDK out-of-bounds write in DDS file handling](https://junglewise.ai/threats/cve-2026-40661-an-out-of-bounds-write-oow-condition-in-the-amd-compressonator)
- [AMD Compressonator SDK integer overflow in DDS parsing](https://junglewise.ai/threats/cve-2026-40659-an-integer-overflow-condition-in-the-amd-compressonator-sdk-could)
- [AMD Compressonator SDK out-of-bounds read in TGA parser](https://junglewise.ai/threats/cve-2026-40652-an-out-of-bounds-read-condition-in-the-amd-compressonator-sdk)
- [AMD Compressonator SDK integer overflow in DDS RGB888 loader](https://junglewise.ai/threats/cve-2026-100493-an-integer-overflow-in-the-dds-rgb888-loader-of-amd)