{"id":"CVE-2026-121958","published":"2026-11-04T16:17:48.610","lastModified":"2026-11-04T19:17:36.827","description":"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.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-122"],"vendors":[],"products":[],"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57","tags":[]},{"url":"https://www.vulncheck.com/advisories/freerdp-through-3.32.1-heap-out-of-bounds-write-via-rdpgfx-hashtable-getkeys","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57","tags":[]}],"exploitRefs":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57","tags":[]},{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m59q-wm7v-mp57","tags":[]}],"hasPoc":true,"ai":null}