{"id":"CVE-2026-23883","summary":"Heap-use-after-free in update_pointer_new","details":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, `xf_Pointer_New` frees `cursorPixels` on failure, then `pointer_free` calls `xf_Pointer_Free` and frees it again, triggering ASan UAF. A malicious server can trigger a client‑side use after free, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.","aliases":["GHSA-qcrr-85qx-4p6x"],"modified":"2026-04-02T13:13:23.674126Z","published":"2026-01-19T17:15:55.735Z","related":["ALSA-2026:2048","ALSA-2026:2081","ALSA-2026:2222","SUSE-SU-2026:0345-1","SUSE-SU-2026:0656-1","SUSE-SU-2026:0683-1","SUSE-SU-2026:0761-1","openSUSE-SU-2026:10107-1","openSUSE-SU-2026:10459-1","openSUSE-SU-2026:20339-1"],"database_specific":{"cwe_ids":["CWE-416"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23883.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L312-L319"},{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/client/X11/xf_graphics.c#L340"},{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/blob/3370e30e92a021eb680892dda14d642bc8b8727c/libfreerdp/cache/pointer.c#L164-L174"},{"type":"WEB","url":"https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23883.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qcrr-85qx-4p6x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23883"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"0"},{"fixed":"6f5d0048f006a2d2ffc9b9fa05f0e98db464c5a4"}]}],"versions":["1.0-beta1","1.0-beta2","1.0-beta3","1.0-beta4","1.0-beta5","1.0.0","1.0.1","1.0.2","1.0.2-rc1","1.0.2-rc2","1.1.0-beta+2013071101","1.1.0-beta1","1.1.0-beta1+android2","1.1.0-beta1+android3","1.1.0-beta1+android4","1.1.0-beta1+android5","1.1.0-beta1+ios1","1.1.0-beta1+ios2","1.1.0-beta1+ios3","1.1.0-beta1+ios4","1.2.0-beta1+android7","1.2.0-beta1+android9","2.0.0","2.0.0-beta1+android10","2.0.0-beta1+android11","2.0.0-rc0","2.0.0-rc1","2.0.0-rc2","2.0.0-rc3","2.0.0-rc4","2.1.0","2.1.1","2.1.2","2.10.0","2.11.0","2.11.1","2.11.2","2.11.3","2.11.4","2.11.5","2.11.6","2.11.7","2.11.8","2.2.0","2.3.0","2.3.1","2.3.2","2.4.1","2.5.0","2.6.0","2.6.1","2.7.0","2.8.0","2.8.1","2.9.0","3.0.0","3.0.0-beta1","3.0.0-beta2","3.0.0-beta3","3.0.0-beta4","3.0.0-rc0","3.1.0","3.10.0","3.10.1","3.10.2","3.10.3","3.11.0","3.11.1","3.12.0","3.13.0","3.14.0","3.14.1","3.15.0","3.16.0","3.17.0","3.17.1","3.17.2","3.18.0","3.19.0","3.19.1","3.2.0","3.20.0","3.20.1","3.20.2","3.3.0","3.4.0","3.5.0","3.5.1","3.6.0","3.6.1","3.6.2","3.6.3","3.7.0","3.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23883.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"}]}