PT-2026-29136 · Freerdp+2 · Freerdp+2

Calvinytt · Published 2026-01-01 · Updated 2026-06-15 · CVE-2026-33983

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions FreeRDP versions prior to 3.24.2

Description FreeRDP is a free implementation of the Remote Desktop Protocol. The progressive decompress tile upgrade() function detects a mismatch through progressive rfx quant cmp equal() but only emits a warning, allowing execution to continue. A wrapped value (247) is used as a shift exponent, leading to undefined behavior and a loop of approximately 80 billion iterations, resulting in a CPU denial of service (DoS).

Recommendations Update to version 3.24.2 or later.

Exploit

Fix

DoS

Integer Overflow

Unchecked Return Value

Weakness Enumeration

CWE-190

CWE-252

Related Identifiers

ALSA-2026:8457

ALSA-2026:8458

ALSA-2026:8945

BDU:2026-04670

CVE-2026-33983

GHSA-4GFM-4P52-H478

OESA-2026-2036

OESA-2026-2037

OESA-2026-2038

OESA-2026-2039

OESA-2026-2040

OPENSUSE-SU-2026:10633-1

OPENSUSE-SU-2026:20657-1

RHSA-2026:10709

RHSA-2026:11332

RHSA-2026:11333

RHSA-2026:11336

RHSA-2026:11649

RHSA-2026:11651

RHSA-2026:12359

RHSA-2026:12388

RHSA-2026:19349

RHSA-2026:8457

RHSA-2026:8458

RHSA-2026:8945

RHSA-2026:9656

SUSE-SU-2026:21436-1

Affected Products

Freerdp

Red Os

Rocky Linux

References · 58

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33983.json · Exploit
• https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425 · Patch
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478 · Vendor Advisory
• https://errata.almalinux.org/10/ALSA-2026-8458.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33983 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2036 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2040 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2026-8945.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33984 · Security Note
• https://osv.dev/vulnerability/CVE-2026-33983 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2037 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33983 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10633-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-33983 · Security Note
• https://osv.dev/vulnerability/ALSA-2026:8457 · Vendor Advisory