CVE-2026-33983 | BDVDB-2026-323751 Detail
FreeRDPFreeRDP
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.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.
Weaknesses#
References#
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478
- https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425
- https://access.redhat.com/security/cve/CVE-2026-33983
- https://bugzilla.redhat.com/show_bug.cgi?id=2453220
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33983.json
- https://access.redhat.com/errata/RHSA-2026:11333
- https://access.redhat.com/errata/RHSA-2026:8458
- https://access.redhat.com/errata/RHSA-2026:19033
- https://access.redhat.com/errata/RHSA-2026:8945
- https://access.redhat.com/errata/RHSA-2026:11651
- https://access.redhat.com/errata/RHSA-2026:11649
- https://access.redhat.com/errata/RHSA-2026:12388
- https://access.redhat.com/errata/RHSA-2026:12359
- https://access.redhat.com/errata/RHSA-2026:11332
- https://access.redhat.com/errata/RHSA-2026:11336
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.