VulnerabilityModified
CVE-2026-33983
FreeRDP is a free implementation of the Remote Desktop Protocol.
MEDIUM 6.5EPSS 0.43%
Does this matter?
Lower severity and a low EPSS score (0.43%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-190, CWE-252
- Affected
- freerdp/freerdp
- Source
- security-advisories@github.com
References
- https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425Patch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478Patch, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:10709
- https://access.redhat.com/errata/RHSA-2026:11332
- https://access.redhat.com/errata/RHSA-2026:11333
- https://access.redhat.com/errata/RHSA-2026:11336
- https://access.redhat.com/errata/RHSA-2026:11649
- https://access.redhat.com/errata/RHSA-2026:11651
- https://access.redhat.com/errata/RHSA-2026:12359
- https://access.redhat.com/errata/RHSA-2026:12388
- https://access.redhat.com/errata/RHSA-2026:19033
- https://access.redhat.com/errata/RHSA-2026:19349
- https://access.redhat.com/errata/RHSA-2026:8457
- https://access.redhat.com/errata/RHSA-2026:8458
- https://access.redhat.com/errata/RHSA-2026:8945
- https://access.redhat.com/errata/RHSA-2026:9656
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.