CVE-2026-33983
published 2026-03-30CVE-2026-33983: FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via…
PriorityP333medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.43%
36.6th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | freerdp2 | < freerdp3 3.24.2+dfsg-1 (forky) | freerdp3 3.24.2+dfsg-1 (forky) |
| debian | freerdp3 | < freerdp3 3.24.2+dfsg-1 (forky) | freerdp3 3.24.2+dfsg-1 (forky) |
| freerdp | freerdp | < 3.24.2 | 3.24.2 |
| ubuntu | freerdp3 | — | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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Ubuntu
FreeRDP vulnerabilities
vendor_ubuntu·2026-07-20
CVE-2026-33995 FreeRDP vulnerabilities
Title: FreeRDP vulnerabilities
Summary: Several security issues were fixed in FreeRDP.
It was discovered that FreeRDP contained multiple security issues. An
attacker could possibly use these issues to obtain sensitive information,
cause FreeRDP to crash, resulting in a denial of service, or execute
arbitrary code.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.
Red Hat
FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
vendor_redhat·2026-03-30·CVSS 6.5
CVE-2026-33983 [MEDIUM] CWE-190 FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
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.
A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). A remote attacker could exploit this vulnerability by sending a specially crafted RDP message. This can lead to an undefined behavior where a wrapped value is used as a shift exponent, causing an appro
Debian
CVE-2026-33983: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
vendor_debian·2026·CVSS 6.5
CVE-2026-33983 [MEDIUM] CVE-2026-33983: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...
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.
Scope: local
bookworm: open
bullseye: open
VulDB
FreeRDP up to 3.24.1 progressive_decompress_tile_upgrade integer overflow (EUVD-2026-17227 / Nessus ID 306291)
vuldb·2026-07-02·CVSS 6.5
CVE-2026-33983 [MEDIUM] FreeRDP up to 3.24.1 progressive_decompress_tile_upgrade integer overflow (EUVD-2026-17227 / Nessus ID 306291)
A vulnerability identified as problematic has been detected in FreeRDP up to 3.24.1. Affected is the function progressive_decompress_tile_upgrade. This manipulation causes integer overflow.
This vulnerability is registered as CVE-2026-33983. Remote exploitation of the attack is possible. No exploit is available.
You should upgrade the affected component.
OSV
CVE-2026-33983: FreeRDP is a free implementation of the Remote Desktop Protocol
osv·2026-03-30·CVSS 6.5
CVE-2026-33983 [MEDIUM] CVE-2026-33983: FreeRDP is a free implementation of the Remote Desktop Protocol
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [fedora-all]
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-33983 [MEDIUM] CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [fedora-all]
CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.
Bugzilla
CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [epel-all]
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-33983 [MEDIUM] CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [epel-all]
CVE-2026-33983 freerdp2: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
FEDORA-EPEL-2026-1c4570b861 (freerdp2-2.11.7-7.el10_4) has been submitted as an update to Fedora EPEL 10.4.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-1c4570b861
---
FEDORA-EPEL-2026-aa30a19f4c has been pushed to the Fedora EPEL 10.3 testing repository.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-aa30a19f4c
See also https://fedoraproject.org/wiki/QA:Updates_Testi
Bugzilla
CVE-2026-33983 FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
bugzilla·2026-03-30·CVSS 6.5
CVE-2026-33983 [MEDIUM] CVE-2026-33983 FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
CVE-2026-33983 FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages
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.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 10
Via RHSA-2026:8458 https://access.redhat.com/errata/RHSA-2026:8458
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:84
Wiz
CVE-2026-33983 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.1
CVE-2026-33983 [MEDIUM] CVE-2026-33983 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-33983 :
NixOS vulnerability analysis and mitigation
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.
Source : NVD
## 6.5
Score
Published March 30, 2026
Severity MEDIUM
CNA Score 6.5
Affected Technologies
NixOS
Wolfi
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 15
Exploitation Probability (EPSS) N/A
Affected
https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478https://access.redhat.com/errata/RHSA-2026:10709https://access.redhat.com/errata/RHSA-2026:11332https://access.redhat.com/errata/RHSA-2026:11333https://access.redhat.com/errata/RHSA-2026:11336https://access.redhat.com/errata/RHSA-2026:11649https://access.redhat.com/errata/RHSA-2026:11651https://access.redhat.com/errata/RHSA-2026:12359https://access.redhat.com/errata/RHSA-2026:12388https://access.redhat.com/errata/RHSA-2026:19033https://access.redhat.com/errata/RHSA-2026:19349https://access.redhat.com/errata/RHSA-2026:8457https://access.redhat.com/errata/RHSA-2026:8458https://access.redhat.com/errata/RHSA-2026:8945https://access.redhat.com/errata/RHSA-2026:9656https://access.redhat.com/security/cve/CVE-2026-33983https://bugzilla.redhat.com/show_bug.cgi?id=2453220https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33983.json
2026-03-30
Published