Detections
Analytics
CVE-2026-33983
high
Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33983.json
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478
https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425
https://bugzilla.redhat.com/show_bug.cgi?id=2453220
https://access.redhat.com/security/cve/CVE-2026-33983
https://access.redhat.com/errata/RHSA-2026:9656
https://access.redhat.com/errata/RHSA-2026:8945
https://access.redhat.com/errata/RHSA-2026:8458
https://access.redhat.com/errata/RHSA-2026:8457
https://access.redhat.com/errata/RHSA-2026:19349
https://access.redhat.com/errata/RHSA-2026:19033
https://access.redhat.com/errata/RHSA-2026:12388
https://access.redhat.com/errata/RHSA-2026:12359
https://access.redhat.com/errata/RHSA-2026:11651
https://access.redhat.com/errata/RHSA-2026:11649
https://access.redhat.com/errata/RHSA-2026:11336
https://access.redhat.com/errata/RHSA-2026:11333