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Fencer Intel
medium 5.9

CVE-2026-33985 json

FreeRDP: ClearCodec Glyph Cache Count Desync - Heap OOB Read

published 7mo ago modified 4mo ago also EUVD-2026-17231

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, pixel data from adjacent heap memory is rendered to screen, potentially leaking sensitive data to the attacker. This issue has been patched in version 3.24.2.

Patch / fix

  • freerdp freerdp 3.24.2
  • freerdp3 Debian 13 3.15.0+dfsg-2.1+deb13u2
  • freerdp3 Debian 14 3.24.2+dfsg-1

debian advisories DEBIAN-CVE-2026-33985

  • freerdp3 Ubuntu 24.04 LTS 3.30.0+dfsg-0ubuntu0.24.04.1

ubuntu advisories UBUNTU-CVE-2026-33985

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 RHEL 9 2:2.11.7-7.el9_8.3
  • libwinpr RHEL 9 2:2.11.7-7.el9_8.3
  • freerdp-libs RHEL 9 2:2.11.7-7.el9_8.3
  • freerdp RHEL 10.2 2:3.10.3-12.el10_2.5
  • libwinpr RHEL 10.2 2:3.10.3-12.el10_2.5
  • freerdp-libs RHEL 10.2 2:3.10.3-12.el10_2.5
  • freerdp-server RHEL 10.2 2:3.10.3-12.el10_2.5
  • freerdp RHEL 9 2:2.11.7-1.el9_7.7

red hat advisories RHSA-2026:20605RHSA-2026:20546RHSA-2026:19811RHSA-2026:19358RHSA-2026:19142RHSA-2026:16866

  • freerdp SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 3.10.3-150700.3.17.1
  • freerdp SLES for SAP applications 16.0, SLES 16.0 3.26.0-160000.1.1

suse advisories SUSE-SU-2026:3562-1SUSE-SU-2026:22194-1

  • freerdp openSUSE Leap 16.0 3.26.0-160000.1.1
  • freerdp openSUSE Tumbleweed 3.24.2-1.1

opensuse advisories openSUSE-SU-2026:21116-1openSUSE-SU-2026:10633-1

  • freerdp AlmaLinux 9 2:2.11.7-7.el9_8.3
  • libwinpr AlmaLinux 9 2:2.11.7-7.el9_8.3
  • freerdp-libs AlmaLinux 9 2:2.11.7-7.el9_8.3
  • freerdp AlmaLinux 9 2:2.11.7-1.el9_7.7
  • libwinpr AlmaLinux 9 2:2.11.7-1.el9_7.7
  • freerdp-libs AlmaLinux 9 2:2.11.7-1.el9_7.7
  • freerdp AlmaLinux 10 2:3.10.3-5.el10_1.8
  • libwinpr AlmaLinux 10 2:3.10.3-5.el10_1.8

almalinux advisories ALSA-2026:19358ALSA-2026:16482ALSA-2026:16014ALSA-2026:16019

  • freerdp Rocky Linux 10 2:3.10.3-12.el10_2.5
  • freerdp Rocky Linux 9 2:2.11.7-7.el9_8.3
  • freerdp Rocky Linux 9 2:2.11.7-1.el9_7.7
  • freerdp Rocky Linux 10 2:3.10.3-5.el10_1.8
  • freerdp Rocky Linux 8 2:2.11.7-9.el8_10

rocky linux advisories RLSA-2026:19142RLSA-2026:19358RLSA-2026:16482RLSA-2026:16014RLSA-2026:16019

  • freerdp Alpine 3.24, Alpine 3.23 3.24.2-r0

alpine advisories ALPINE-CVE-2026-33985

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-33985 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-33985 updated cvss 5.3

FreeRDP: FreeRDP: Information disclosure via heap memory out of bounds read

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder EUS (v.9.4) freerdp-devel 2.11.2-1.el9_4.8, libwinpr-devel 2.11.2-1.el9_4.8, freerdp-debuginfo 2.11.2-1.el9_4.8, libwinpr-debuginfo 2.11.2-1.el9_4.8, freerdp-debugsource 2.11.2-1.el9_4.8, freerdp-libs-debuginfo 2.11.2-1.el9_4.8
    fixed: vendor fix RHSA-2026:16866
  • Red Hat CodeReady Linux Builder EUS (v.9.6) freerdp-devel 2.11.7-1.el9_6.10, libwinpr-devel 2.11.7-1.el9_6.10, freerdp-debuginfo 2.11.7-1.el9_6.10, libwinpr-debuginfo 2.11.7-1.el9_6.10, freerdp-debugsource 2.11.7-1.el9_6.10, freerdp-libs-debuginfo 2.11.7-1.el9_6.10
    fixed: vendor fix RHSA-2026:16865
  • Red Hat Enterprise Linux AppStream (v. 8) freerdp 2.11.7-9.el8_10, libwinpr 2.11.7-9.el8_10, freerdp-libs 2.11.7-9.el8_10
    fixed: vendor fix RHSA-2026:16019
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.7-1.el9_7.7, freerdp 2.11.7-7.el9_8.3, libwinpr 2.11.7-1.el9_7.7, libwinpr 2.11.7-7.el9_8.3, freerdp-libs 2.11.7-1.el9_7.7, freerdp-libs 2.11.7-7.el9_8.3
    fixed: vendor fix RHSA-2026:16482
  • Red Hat Enterprise Linux AppStream (v. 10) freerdp 3.10.3-5.el10_1.8, freerdp 3.10.3-12.el10_2.5, libwinpr 3.10.3-5.el10_1.8, libwinpr 3.10.3-12.el10_2.5, freerdp-libs 3.10.3-5.el10_1.8, freerdp-libs 3.10.3-12.el10_2.5
    fixed: vendor fix RHSA-2026:16014
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) freerdp 2.2.0-14.el8_4, libwinpr 2.2.0-14.el8_4, freerdp-libs 2.2.0-14.el8_4
    fixed: vendor fix RHSA-2026:19811
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) freerdp 2.2.0-7.el8_6.8, libwinpr 2.2.0-7.el8_6.8, freerdp-libs 2.2.0-7.el8_6.8 Red Hat Enterprise Linux AppStream E4S (v.8.6) freerdp 2.2.0-7.el8_6.8, libwinpr 2.2.0-7.el8_6.8, freerdp-libs 2.2.0-7.el8_6.8
    fixed: vendor fix RHSA-2026:16814
show 14 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) freerdp 2.2.0-12.el8_8.8, libwinpr 2.2.0-12.el8_8.8, freerdp-libs 2.2.0-12.el8_8.8
    fixed: vendor fix RHSA-2026:16777
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) freerdp 2.4.1-3.el9_0.7, libwinpr 2.4.1-3.el9_0.7, freerdp-libs 2.4.1-3.el9_0.7
    fixed: vendor fix RHSA-2026:16485
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) freerdp 2.4.1-6.el9_2.9, libwinpr 2.4.1-6.el9_2.9, freerdp-libs 2.4.1-6.el9_2.9
    fixed: vendor fix RHSA-2026:16483
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) freerdp 3.10.3-3.el10_0.7, libwinpr 3.10.3-3.el10_0.7, freerdp-libs 3.10.3-3.el10_0.7
    fixed: vendor fix RHSA-2026:20605
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) freerdp 2.11.2-1.el9_4.8, libwinpr 2.11.2-1.el9_4.8, freerdp-libs 2.11.2-1.el9_4.8
    fixed: vendor fix RHSA-2026:16866
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) freerdp 2.11.7-1.el9_6.10, libwinpr 2.11.7-1.el9_6.10, freerdp-libs 2.11.7-1.el9_6.10
    fixed: vendor fix RHSA-2026:16865
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) freerdp 2.2.0-14.el8_4, libwinpr 2.2.0-14.el8_4, freerdp-libs 2.2.0-14.el8_4
    fixed: vendor fix RHSA-2026:19811
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) freerdp 2.2.0-7.el8_6.8, libwinpr 2.2.0-7.el8_6.8, freerdp-libs 2.2.0-7.el8_6.8
    fixed: vendor fix RHSA-2026:16814
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) freerdp 2.2.0-12.el8_8.8, libwinpr 2.2.0-12.el8_8.8, freerdp-libs 2.2.0-12.el8_8.8
    fixed: vendor fix RHSA-2026:16777
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel 2.11.7-1.el9_7.7, freerdp-devel 2.11.7-7.el9_8.3, libwinpr-devel 2.11.7-1.el9_7.7, libwinpr-devel 2.11.7-7.el9_8.3, freerdp-debuginfo 2.11.7-1.el9_7.7, freerdp-debuginfo 2.11.7-7.el9_8.3, +6 more
    fixed: vendor fix RHSA-2026:16482
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-server 3.10.3-5.el10_1.8, freerdp-server 3.10.3-12.el10_2.5
    fixed: vendor fix RHSA-2026:16014
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) freerdp-server 3.10.3-3.el10_0.7
    fixed: vendor fix RHSA-2026:20605
  • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel 2.11.7-9.el8_10, freerdp-debuginfo 2.11.7-9.el8_10, libwinpr-debuginfo 2.11.7-9.el8_10, freerdp-debugsource 2.11.7-9.el8_10, freerdp-libs-debuginfo 2.11.7-9.el8_10
    fixed: vendor fix RHSA-2026:16019
  • Red Hat Enterprise Linux Server (v. 7 ELS) freerdp 2.1.1-5.el7_9.9, libwinpr 2.1.1-5.el7_9.9, freerdp-libs 2.1.1-5.el7_9.9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) freerdp-devel 2.1.1-5.el7_9.9, libwinpr-devel 2.1.1-5.el7_9.9, freerdp-debuginfo 2.1.1-5.el7_9.9
    fixed: vendor fix RHSA-2026:20546

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
no
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:L
NVD 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L

Affected products

  • FreeRDP FreeRDP

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-131 Incorrect Calculation of Buffer Size

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.