CVE-2026-57156

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. This issue is fixed in version 3.28.0.

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Weakness Type (CWE)

CWE-122 CWE-122

CWE-190 Integer Overflow

References

Other References

https://github.com/FreeRDP/FreeRDP/commit/487f35daccb36a6224e530dcd8fa60850825f823 https://github.com/FreeRDP/FreeRDP/pull/12938 https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0 https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v5wf-j8j4-77h7

Frequently Asked Questions

What is CVE-2026-57156? +

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. This issue is fixed in version 3.28.0.

How do I check if I'm vulnerable to CVE-2026-57156? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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