CVE-2026-121952 FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 Capability
CriticalCVSS 9.3
- Published
- Updated
- Exploit status
- No public exploit known
Description
FreeRDP before 3.32.2 has an out-of-bounds write in the proxy because rdp_read_bitmap_cache_v2_capability_set rejects only numCellCaches values above 5, yet the bitmap cache v2 cell array is later accessed at fixed indices 0 through 4. A client connecting to the proxy can declare fewer than five cell caches in its Confirm Active, causing heap corruption, heap data leakage to the backend, or a crash.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| FreeRDP | < 3.32.2 | 3.32.2 |
| redhat/freerdp(Red Hat:enterprise_linux:10) | All versions | No fix listed |
References
- GitHub Security Advisory (GHSA-xc85-4mqc-xgcx) exploit vendor-advisory
- VulnCheck Advisory: FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 Capability third-party-advisory
- Red Hat CVE page mitigation vendor-advisory
- Red Hat Bugzilla 2567902 issue-tracking
- www.cve.org
- nvd.nist.gov