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Fencer Vulns
high 8.1

CVE-2026-22856 json

FreeRDP has a heap-use-after-free in create_irp_thread

published 2026-01-14 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2671

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

Patch / fix

  • freerdp freerdp 3.20.1
  • freerdp3 Debian 13 3.15.0+dfsg-2.1+deb13u1
  • freerdp3 Debian 14 3.20.2+dfsg-1

debian advisories DEBIAN-CVE-2026-22856

  • freerdp3 Ubuntu 24.04 LTS 3.5.1+dfsg1-0ubuntu1.4
  • freerdp3 Ubuntu 25.10 3.16.0+dfsg-2ubuntu0.3
  • freerdp3 Ubuntu 26.04 LTS 3.20.2+dfsg-1

ubuntu advisories UBUNTU-CVE-2026-22856

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 10.2 2:3.10.3-12.el10_2.2
  • libwinpr RHEL 10.2 2:3.10.3-12.el10_2.2
  • freerdp-libs RHEL 10.2 2:3.10.3-12.el10_2.2
  • freerdp-server RHEL 10.2 2:3.10.3-12.el10_2.2
  • freerdp RHEL 8 2:2.11.7-6.el8_10
  • libwinpr RHEL 8 2:2.11.7-6.el8_10
  • freerdp-libs RHEL 8 2:2.11.7-6.el8_10
  • freerdp RHEL 10.1 2:3.10.3-5.el10_1.5

red hat advisories RHSA-2026:19033RHSA-2026:11323RHSA-2026:10951RHSA-2026:10735RHSA-2026:10734RHSA-2026:9640

  • freerdp2 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 2.11.7-150700.3.3.1
  • freerdp SLE Module for Package Hub 15 SP7 2.4.0-150400.3.35.1
  • freerdp SLE Module for Package Hub 15 SP7, openSUSE Leap 15.6 2.11.2-150600.4.6.1
  • freerdp SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 3.10.3-150700.3.3.1
  • freerdp SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.1.2-12.52.1

suse advisories SUSE-SU-2026:0559-1SUSE-SU-2026:0449-1SUSE-SU-2026:0421-1SUSE-SU-2026:0417-1SUSE-SU-2026:0345-1

  • freerdp openSUSE Leap 16.0 3.22.0-160000.1.1
  • freerdp2 openSUSE Leap 16.0 2.11.7-bp160.2.1
  • freerdp2 openSUSE Tumbleweed 2.11.7-4.1
  • freerdp openSUSE Tumbleweed 3.20.2-1.1

opensuse advisories openSUSE-SU-2026:20339-1openSUSE-SU-2026:20320-1openSUSE-SU-2026:10176-1openSUSE-SU-2026:10059-1

  • freerdp AlmaLinux 10 2:3.10.3-5.el10_1.5
  • libwinpr AlmaLinux 10 2:3.10.3-5.el10_1.5
  • freerdp-libs AlmaLinux 10 2:3.10.3-5.el10_1.5
  • freerdp-server AlmaLinux 10 2:3.10.3-5.el10_1.5
  • freerdp AlmaLinux 8 2:2.11.7-6.el8_10
  • libwinpr AlmaLinux 8 2:2.11.7-6.el8_10
  • freerdp-libs AlmaLinux 8 2:2.11.7-6.el8_10
  • freerdp AlmaLinux 9 2:2.11.7-1.el9_7.5

almalinux advisories ALSA-2026:6799ALSA-2026:6918ALSA-2026:6340

  • freerdp Rocky Linux 10 2:3.10.3-5.el10_1.5
  • freerdp Rocky Linux 8 2:2.11.7-6.el8_10
  • freerdp Rocky Linux 9 2:2.11.7-1.el9_7.5

rocky linux advisories RLSA-2026:6799RLSA-2026:6918RLSA-2026:6340

  • freerdp Alpine 3.23 3.22.0-r0

alpine advisories ALPINE-CVE-2026-22856

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

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-2026-22856 updated cvss 8.1

freerdp: FreeRDP heap-use-after-free

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins
    affected: workaround, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder EUS (v.9.4) freerdp-devel 2.11.2-1.el9_4.5, libwinpr-devel 2.11.2-1.el9_4.5, freerdp-debuginfo 2.11.2-1.el9_4.5, libwinpr-debuginfo 2.11.2-1.el9_4.5, freerdp-debugsource 2.11.2-1.el9_4.5, freerdp-libs-debuginfo 2.11.2-1.el9_4.5
    fixed: vendor fix RHSA-2026:6958
  • Red Hat CodeReady Linux Builder EUS (v.9.6) freerdp-devel 2.11.7-1.el9_6.7, libwinpr-devel 2.11.7-1.el9_6.7, freerdp-debuginfo 2.11.7-1.el9_6.7, libwinpr-debuginfo 2.11.7-1.el9_6.7, freerdp-debugsource 2.11.7-1.el9_6.7, freerdp-libs-debuginfo 2.11.7-1.el9_6.7
    fixed: vendor fix RHSA-2026:6727
  • Red Hat Enterprise Linux AppStream (v. 8) freerdp 2.11.7-6.el8_10, libwinpr 2.11.7-6.el8_10, freerdp-libs 2.11.7-6.el8_10
    fixed: vendor fix RHSA-2026:6918
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.7-1.el9_7.5, libwinpr 2.11.7-1.el9_7.5, freerdp-libs 2.11.7-1.el9_7.5
    fixed: vendor fix RHSA-2026:6340
  • Red Hat Enterprise Linux AppStream (v. 10) freerdp 3.10.3-5.el10_1.5, freerdp 3.10.3-12.el10_2.2, libwinpr 3.10.3-5.el10_1.5, libwinpr 3.10.3-12.el10_2.2, freerdp-libs 3.10.3-5.el10_1.5, freerdp-libs 3.10.3-12.el10_2.2
    fixed: vendor fix RHSA-2026:6799
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) freerdp 2.0.0-46.rc4.el8_2.10, libwinpr 2.0.0-46.rc4.el8_2.10, freerdp-libs 2.0.0-46.rc4.el8_2.10
    fixed: vendor fix RHSA-2026:10734
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) freerdp 2.2.0-12.el8_4, libwinpr 2.2.0-12.el8_4, freerdp-libs 2.2.0-12.el8_4
    fixed: vendor fix RHSA-2026:10735
show 15 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) freerdp 2.2.0-7.el8_6.5, libwinpr 2.2.0-7.el8_6.5, freerdp-libs 2.2.0-7.el8_6.5 Red Hat Enterprise Linux AppStream E4S (v.8.6) freerdp 2.2.0-7.el8_6.5, libwinpr 2.2.0-7.el8_6.5, freerdp-libs 2.2.0-7.el8_6.5
    fixed: vendor fix RHSA-2026:10951
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) freerdp 2.2.0-12.el8_8.5, libwinpr 2.2.0-12.el8_8.5, freerdp-libs 2.2.0-12.el8_8.5
    fixed: vendor fix RHSA-2026:10076
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) freerdp 2.4.1-3.el9_0.4, libwinpr 2.4.1-3.el9_0.4, freerdp-libs 2.4.1-3.el9_0.4
    fixed: vendor fix RHSA-2026:9640
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) freerdp 2.4.1-6.el9_2.6, libwinpr 2.4.1-6.el9_2.6, freerdp-libs 2.4.1-6.el9_2.6
    fixed: vendor fix RHSA-2026:9641
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) freerdp 3.10.3-3.el10_0.5, libwinpr 3.10.3-3.el10_0.5, freerdp-libs 3.10.3-3.el10_0.5
    fixed: vendor fix RHSA-2026:6743
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) freerdp 2.11.2-1.el9_4.5, libwinpr 2.11.2-1.el9_4.5, freerdp-libs 2.11.2-1.el9_4.5
    fixed: vendor fix RHSA-2026:6958
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) freerdp 2.11.7-1.el9_6.7, libwinpr 2.11.7-1.el9_6.7, freerdp-libs 2.11.7-1.el9_6.7
    fixed: vendor fix RHSA-2026:6727
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) freerdp 2.2.0-12.el8_4, libwinpr 2.2.0-12.el8_4, freerdp-libs 2.2.0-12.el8_4
    fixed: vendor fix RHSA-2026:10735
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) freerdp 2.2.0-7.el8_6.5, libwinpr 2.2.0-7.el8_6.5, freerdp-libs 2.2.0-7.el8_6.5
    fixed: vendor fix RHSA-2026:10951
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) freerdp 2.2.0-12.el8_8.5, libwinpr 2.2.0-12.el8_8.5, freerdp-libs 2.2.0-12.el8_8.5
    fixed: vendor fix RHSA-2026:10076
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel 2.11.7-1.el9_7.5, libwinpr-devel 2.11.7-1.el9_7.5, freerdp-debuginfo 2.11.7-1.el9_7.5, libwinpr-debuginfo 2.11.7-1.el9_7.5, freerdp-debugsource 2.11.7-1.el9_7.5, freerdp-libs-debuginfo 2.11.7-1.el9_7.5
    fixed: vendor fix RHSA-2026:6340
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-server 3.10.3-5.el10_1.5, freerdp-server 3.10.3-12.el10_2.2
    fixed: vendor fix RHSA-2026:6799
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) freerdp-server 3.10.3-3.el10_0.5
    fixed: vendor fix RHSA-2026:6743
  • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel 2.11.7-6.el8_10, freerdp-debuginfo 2.11.7-6.el8_10, libwinpr-debuginfo 2.11.7-6.el8_10, freerdp-debugsource 2.11.7-6.el8_10, freerdp-libs-debuginfo 2.11.7-6.el8_10
    fixed: vendor fix RHSA-2026:6918
  • Red Hat Enterprise Linux Server (v. 7 ELS) freerdp 2.1.1-5.el7_9.7, libwinpr 2.1.1-5.el7_9.7, freerdp-libs 2.1.1-5.el7_9.7 Red Hat Enterprise Linux Server Optional (v. 7 ELS) freerdp-devel 2.1.1-5.el7_9.7, libwinpr-devel 2.1.1-5.el7_9.7, freerdp-debuginfo 2.1.1-5.el7_9.7
    fixed: vendor fix RHSA-2026:11323

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
total
Assessed
9 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.8 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CNA 4.0 6.8 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • FreeRDP FreeRDP

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
  • CWE-416 Use After Free

References

Sources

Fencer Vulns 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.