CVE-2026-55192
CVE-2026-55192: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh8.1
High [CVE-2026-55192] Out-of-bounds read leads to memory disclosure or client crash
CVE-2026-55192Source published Source updated
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP H.264 decoder backends can return YUV planes sized from the bitstream without comparing the decoded width and height to the RDPGFX surface dimensions used to validate region rectangles. A malicious RDP server can provide an AVC420 or AVC444 bitstream whose decoded frame is smaller than the negotiated surface, causing yuv420_context_decode and the YUV-to-RGB conversion paths to read beyond the decoder-owned planes in libfreerdp/codec/h264.c and the selected H.264 backend. This can disclose client memory or crash the client. This issue is fixed in version 3.27.0. A flaw was found in FreeRDP. When handling AVC420 or AVC444 bitstreams, decoder backends fail to validate frame dimensions against…
- Affected products in this advisory
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 10
- Red Hat package: freerdp
- Source-reported affected versions
- < 3.27.0
- Source-reported fixed versions
- 3.27.0
- freerdp-0:2.1.1-5.el7_9.12
- RHSA-2026:68707
- Mitigation guidance
- To mitigate this vulnerability, disable H.264 graphics acceleration in client connection parameters (e.g., omitting `/gfx:avc420` or `/gfx:avc444` in `xfreerdp`) to force legacy RemoteFX or standard software bitmap rendering.
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