# CVE-2026-110837: FreeRDP heap-based buffer overflow in MP3 audio decoding

Source: https://junglewise.ai/threats/cve-2026-110837-freerdp-2-0-0-before-3-32-0-when-built-with-with-lame-on-and  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-10-23  
License: CC BY 4.0 with a link back

CVE-2026-110837 · Severity: high · CVSS 7.1 · Published 2026-10-14

FreeRDP is a client that allows users to connect to remote Windows desktops over RDP. When built with LAME MP3 support but without FFmpeg acceleration, a malicious RDP server can send specially crafted MP3 audio that causes a heap buffer overflow, crashing the FreeRDP client and potentially allowing an attacker to execute code on the client system.

Technologies: [FreeRDP](https://junglewise.ai/threats/technologies/freerdp), [FreeRDP Project FreeRDP](https://junglewise.ai/threats/technologies/freerdp-project-freerdp). Vendors: [FreeRDP](https://junglewise.ai/threats/vendors/freerdp), [FreeRDP Project](https://junglewise.ai/threats/vendors/freerdp-project).

## Quick answers

**Is CVE-2026-110837 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-110837 being exploited in the wild.

**How severe is CVE-2026-110837?** High severity, with a CVSS score of 7.1, published 14 October 2026.

**Which products and versions are affected?** FreeRDP Project FreeRDP 2.0.0 before 3.32.0.

**Is there a fix for CVE-2026-110837?** Yes: fixed in 3.32.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-110837 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-110837?** Check whether you run FreeRDP or FreeRDP Project FreeRDP at an affected version. 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.

## How to fix

- Fixed in 3.32.0

## Technical details

The vulnerability exists in freerdp_dsp_decode_mp3 when FreeRDP is built with WITH_LAME=ON and WITH_DSP_FFMPEG=OFF. The code reserves a heap buffer for PCM output but treats a byte count as short (2-byte) element offsets when positioning the right-channel pointer, placing it beyond the allocated buffer. A remote RDP server can exploit this by sending MP3 audio via RDPSND that causes decoded right-channel samples to overflow the heap boundary, confirmed to crash clients via buffer overflow detection.

## Affected products

- FreeRDP Project FreeRDP 2.0.0 before 3.32.0

## Timeline

- 2026-09-30: disclosed
- 2026-10-14: advisory

## References

- [https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-52xc-5973-w5vv](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-52xc-5973-w5vv)
- [https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-heap-buffer-overflow-via-mp3-audio-decoding](https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-heap-buffer-overflow-via-mp3-audio-decoding)

## Related threats

- [FreeRDP heap use-after-free in brush cache](https://junglewise.ai/threats/cve-2026-125394-freerdp-before-3-33-0-contains-a-heap-use-after-free)
- [FreeRDP heap buffer overflow in RD Gateway RPC client](https://junglewise.ai/threats/cve-2026-121964-freerdp-before-3-32-2-contains-a-heap-based-buffer-overflow-in)
- [FreeRDP use-after-free in dynamic rdpsnd channel](https://junglewise.ai/threats/cve-2026-121963-freerdp-before-3-32-2-contains-a-use-after-free-vulnerability-in)
- [FreeRDP heap buffer overflow in transport_default_read_pdu](https://junglewise.ai/threats/cve-2026-121962-freerdp-before-3-32-2-contains-a-heap-buffer-overflow-in)
- [FreeRDP use-after-free in DRDYNVC tracker race condition](https://junglewise.ai/threats/cve-2026-121961-freerdp-before-3-32-2-contains-a-use-after-free-vulnerability-in)