CVE-2026-33983
mediumpriority · track · 0EPSS 0.004 · 38 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (17)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-0880FreeRDP: Mehrere SchwachstellenDeutsch2026-03-25csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in FreeRDP ausnutzen, um potenziell beliebigen Code auszuführen, einen Denial-of-Service-Zustand herbeizuführen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder andere, nicht näher spezifizierte Angriffe durchzuführen.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (25)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2026-33983cnnvd
- https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425cnnvd
- https://github.com/FreeRDP/FreeRDP/releasesPatchcnnvd
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478cnnvd
- https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425enisa_euvd
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478enisa_euvd
- https://access.redhat.com/errata/RHSA-2026:10709nvd
- https://access.redhat.com/errata/RHSA-2026:11332nvd
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