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Fencer Intel
medium 6.5

CVE-2026-121388 json

FreeRDP 3.0.0 before 3.32.2 Uncapped Memory Allocation via DRDYNVC DATA_FIRST

published 6d ago modified 6d ago also EUVD-2026-115920

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits
0
none known

Summary

FreeRDP from 3.0.0 before 3.32.2 contains an uncontrolled resource allocation vulnerability that allows malicious RDP servers to force large client allocations through the DRDYNVC DATA_FIRST Length field. Attackers can declare lengths up to 4,294,967,295 bytes on running dynamic channels, causing StreamPool_Take to reserve memory before body validation and exhaust client memory.

Patch / fix

  • FreeRDP FreeRDP 3.32.2
  • freerdp3 Debian 14 3.32.2+dfsg-1

debian advisories DEBIAN-CVE-2026-121388

  • freerdp3 Ubuntu 24.04 LTS 3.32.2+dfsg-0ubuntu0.24.04.1
  • freerdp3 Ubuntu 26.10 3.32.2+dfsg-0ubuntu0.26.10.1
  • freerdp3 Ubuntu 26.04 LTS 3.32.2+dfsg-0ubuntu0.26.04.1

ubuntu advisories UBUNTU-CVE-2026-121388

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • freerdp AlmaLinux 10 2:3.32.2-1.el10_2
  • libwinpr AlmaLinux 10 2:3.32.2-1.el10_2
  • freerdp-libs AlmaLinux 10 2:3.32.2-1.el10_2
  • freerdp-server AlmaLinux 10 2:3.32.2-1.el10_2

almalinux advisories ALSA-2026:94514

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-121388 updated cvss 6.5

freerdp: freerdp: Denial of Service via uncontrolled memory allocation in dynamic virtual channels

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins Red Hat Enterprise Linux 7 freerdp, libwinpr, freerdp-libs, freerdp-plugins Red Hat Enterprise Linux 8 freerdp, libwinpr, freerdp-libs Red Hat Enterprise Linux 9 freerdp, libwinpr, freerdp-libs
    affected: no fix available “Fix deferred”
  • Red Hat Enterprise Linux AppStream (v. 10) freerdp 3.32.2-1.el10_2, libwinpr 3.32.2-1.el10_2, freerdp-libs 3.32.2-1.el10_2 Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-server 3.32.2-1.el10_2
    fixed: vendor fix RHSA-2026:94514

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6d ago

Exploit prediction

0.31% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • FreeRDP FreeRDP

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.