{"id":"CVE-2026-109939","published":"2026-10-13T14:17:31.767","lastModified":"2026-10-13T20:39:48.767","description":"FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in update_read_cache_bitmap_v3_order() in libfreerdp/core/orders.c, which accesses the client bitmap cache when the CBR3_DO_NOT_CACHE flag is set, even though the cache is not yet initialized before Demand Active. A malicious or compromised RDP server can send a Cache Bitmap V3 order during connection setup to crash a connecting client that has enabled the non-default Bitmap Cache V3 feature (/cache:codec:<rfx|nsc|jpeg>).","cvssScore":6.5,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwes":["CWE-476"],"vendors":[],"products":[],"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cq4m-gwc5-w8rc","tags":[]},{"url":"https://www.vulncheck.com/advisories/freerdp-3.27.1-before-3.32.0-null-pointer-dereference-via-cache-bitmap-v3-order","tags":[]}],"exploitRefs":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cq4m-gwc5-w8rc","tags":[]}],"hasPoc":true,"ai":null}