{"id":"CVE-2026-109939","title":"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 …","summary":"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 …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T17:17:32.440","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109939","references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cq4m-gwc5-w8rc","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/freerdp-3.27.1-before-3.32.0-null-pointer-dereference-via-cache-bitmap-v3-order","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T14:29:01.849Z","slug":"CVE-2026-109939","body":"## Overview\n\nFreeRDP 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>).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}