CVE-2026-121958
highFreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving…
FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE PDUs, and then sending ENDFRAME or RESETGRAPHICS.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/freerdp-through-3.32.1-heap-out-of-bounds-write-via-r... disclosure@vulncheck.com
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57 134c704f-9b21-4f2e-91b3-4a467353bcc0