Bug 2567941 (CVE-2026-121953)
| Summary: | CVE-2026-121953 freerdp: freerdp: Use-after-free via rdpgfx dynamic virtual channel close | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | rhel-process-autobot, watson-tool-maintainers |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in FreeRDP. A use-after-free vulnerability exists in the client's Remote Desktop Protocol Graphics (RDPGFX) dynamic virtual channel handling. A malicious RDP server can open a second dynamic virtual channel that reuses an already registered channel name with a different ChannelId, overwriting the listener's single callback slot. When that second channel is closed, the callback is freed without clearing the slot. A subsequent PDU on the original channel then dereferences freed memory, which can crash the client or potentially lead to arbitrary code execution.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2568266, 2568267 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-11-05 22:38:08 UTC
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