Quick answers
- Is CVE-2026-121954 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-121954 being exploited in the wild.
- How severe is CVE-2026-121954?
- Medium severity, with a CVSS score of 6.5, published 4 November 2026.
- Which products and versions are affected?
- FreeRDP before 3.32.2.
- Is there a fix for CVE-2026-121954?
- Yes: fixed in 3.32.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-121954 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-121954?
- Check whether you run 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: 3.32.2
Technical details
The planar codec in FreeRDP's freerdp_bitmap_planar_context_reset function commits new buffer dimensions before successfully allocating the required memory. When a ResetGraphics PDU with oversized dimensions fails allocation, the geometry state remains updated while buffers retain their old, smaller sizes. A subsequent GFX PLANAR command then writes beyond these buffers' bounds, causing heap corruption. Attack requires an RDP handshake and active connection state but no user interaction.
Affected products
- FreeRDP FreeRDP before 3.32.2
Timeline
- 2026-10-20: disclosed
- 2026-11-04: advisory