7.5

CVE-2026-33983

FreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Freerdp ≫ Freerdp Version < 3.24.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.43% 0.341
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-190 Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

CWE-252 Unchecked Return Value

The product does not check the return value from a method or function, which can prevent it from detecting unexpected states and conditions.

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4gfm-4p52-h478
Patch
Vendor Advisory
https://github.com/FreeRDP/FreeRDP/commit/78188ab479c8e6eb9ba2475b3732c76b4bbe5425
Patch
https://access.redhat.com/errata/RHSA-2026:19033
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-2026:19349
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