FreeRDP versions 3.28.0 and earlier contain an out-of-bounds read vulnerability in the RDP6 planar RLE bitmap decoder functions planar_decompress_plane_rle and planar_decompress_plane_rle_only in libfreerdp/codec/planar.c. Only the 1-byte control byte is bounds-checked; the subsequent 0–15 attacker-declared raw bytes are read without validating that the source buffer contains them. A malicious or compromised RDP server can send a truncated planar-encoded bitmap or surface update (reachable via both the Bitmap Update PDU and RDPGFX Surface Command paths) that causes the client to read past the end of the source buffer. The issue is fixed in FreeRDP 3.29.0.
This page covers CVE-2026-67306 as tracked by Ubuntu, for the package freerdp. The fix is available in version 3.30.0+dfsg-0ubuntu0.26.04.1; earlier versions remain affected.
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality low, integrity none, availability low.
The score comes from this vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
UBUNTU-CVE-2026-67306 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.
UBUNTU-CVE-2026-67306 is recorded against 3 packages.
Published on 1 August 2026 and last revised on 17 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
ubuntu.com (Report)
www.cve.org (Report)
github.com (Report)
github.com (Report)
www.vulncheck.com (Report)
freerdp has other advisories on record. If you are patching this one, these are worth checking on the same host:
These advisories are the same class of weakness (CWE-125: Out-of-bounds Read) in other software:
Details
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| freerdp | — | — |
| freerdp2 | — | — |
| freerdp3 | — | 3.30.0+dfsg-0ubuntu0.26.04.1 |
References
Similar Threats
Vulnerability Monitoring
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