Medium [CVE-2026-63117] Denial of Service via ADPCM frame size calculation
This medium-severity Red Hat Linux advisory covers CVE-2026-63117 affecting Red Hat Enterprise Linux 10, Red Hat package: freerdp.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol. An authenticated Remote Desktop Protocol (RDP) client can trigger a denial of service by sending a specially crafted DVI ADPCM frame.
By advertising specific nBlockAlign and nChannels values, a division-by-zero error occurs in the rdpsnd_server_select_format function. This vulnerability leads to the termination of the server-side rdpsnd channel process, causing a denial of service.
A divide-by-zero flaw was found in FreeRDP's `rdpsnd` audio channel server implementation. An authenticated remote RDP client can send malformed DVI ADPCM audio parameters (`nBlockAlign=8`, `nChannels=2`) during format selection in `rdpsnd_server_select_format`.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-369.
Affected Red Hat products: Red Hat Enterprise Linux 10. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: freerdp.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To mitigate this issue, administrators can disable audio redirection on the FreeRDP server configuration if remote audio support is not strictly required.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.