CVE-2026-31897 FreeRDP has an out-of-bounds read in `freerdp_bitmap_decompress_planar`
An out-of-bounds read in FreeRDP allows attackers to cause crashes or leak memory when processing malformed bitmap data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-31897?
CVE-2026-31897 is a memory corruption vulnerability in Freerdp Freerdp, published on 13 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-125
Which versions are affected by CVE-2026-31897?
It affects 1 product.
Products include Freerdp Freerdp.
How do I fix CVE-2026-31897?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-31897 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31897 exists.
Other vulnerabilities in Freerdp Freerdp
- CVE-2021-37594 Other in n/a
- CVE-2021-37595 Other in n/a
- CVE-2026-67305 FreeRDP Windows Client before 3.29.0 Heap Buffer Overflow via Cliprdr
- CVE-2026-66402 FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
- CVE-2026-67289 FreeRDP before 3.29.0 HTTP Proxy Request Injection via Redirection
Sources
Also known as DEBIAN-CVE-2026-31897, GHSA-xgv6-r22m-7c9x, MINI-vmqp-6f65-9356, UBUNTU-CVE-2026-31897.