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Fencer Vulns
high 8.8

CVE-2026-45700 json

Heap-buffer-overflow write in planar bitmap decoder

published 2026-05-29 5 mo ago modified 2026-07-29 3 mo ago also EUVD-2026-33436

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
6.1%
EPSS 6.1% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 2:3.10.3-12.el10_2.6
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 2:3.10.3-3.el10_0.9
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.1.1-5.el7_9.10
  • Red Hat Red Hat Enterprise Linux 8 2:2.11.7-10.el8_10
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 2:2.2.0-14.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 2:2.2.0-14.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 2:2.2.0-7.el8_6.9
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 2:2.2.0-7.el8_6.9
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 2:2.2.0-12.el8_8.9
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 2:2.2.0-12.el8_8.9
  • Red Hat Red Hat Enterprise Linux 9 2:2.11.7-7.el9_8.4
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 2:2.4.1-6.el9_2.10
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 2:2.11.2-1.el9_4.9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 2:2.11.7-1.el9_6.11
  • freerdp3 Debian 14 3.26.0+dfsg-1

debian advisories DEBIAN-CVE-2026-45700

  • freerdp2 Ubuntu 22.04 LTS 2.6.1+dfsg1-3ubuntu2.11
  • freerdp3 Ubuntu 24.04 LTS 3.5.1+dfsg1-0ubuntu1.6
  • freerdp3 Ubuntu 25.10 3.16.0+dfsg-2ubuntu0.5
  • freerdp3 Ubuntu 26.04 LTS 3.24.2+dfsg-1ubuntu1.1
  • freerdp2 Ubuntu Pro 18.04 LTS 2.2.0+dfsg1-0ubuntu0.18.04.4+esm6
  • freerdp2 Ubuntu Pro 20.04 LTS 2.6.1+dfsg1-0ubuntu0.20.04.2+esm4
  • freerdp2 Ubuntu Pro 24.04 LTS 2.11.5+dfsg1-1ubuntu0.1~esm6

ubuntu advisories UBUNTU-CVE-2026-45700

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 8 2:2.11.7-10.el8_10
  • libwinpr RHEL 8 2:2.11.7-10.el8_10
  • freerdp-libs RHEL 8 2:2.11.7-10.el8_10
  • freerdp RHEL 9 2:2.11.7-7.el9_8.4
  • libwinpr RHEL 9 2:2.11.7-7.el9_8.4
  • freerdp-libs RHEL 9 2:2.11.7-7.el9_8.4
  • freerdp RHEL 10.2 2:3.10.3-12.el10_2.6
  • libwinpr RHEL 10.2 2:3.10.3-12.el10_2.6

red hat advisories RHSA-2026:47201RHSA-2026:47049RHSA-2026:47048RHSA-2026:46393RHSA-2026:46389RHSA-2026:46388

  • 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 3.26.0-3.1

opensuse advisories openSUSE-SU-2026:21116-1openSUSE-SU-2026:10948-1

  • freerdp AlmaLinux 8 2:2.11.7-10.el8_10
  • libwinpr AlmaLinux 8 2:2.11.7-10.el8_10
  • freerdp-libs AlmaLinux 8 2:2.11.7-10.el8_10
  • freerdp AlmaLinux 9 2:2.11.7-7.el9_8.4
  • libwinpr AlmaLinux 9 2:2.11.7-7.el9_8.4
  • freerdp-libs AlmaLinux 9 2:2.11.7-7.el9_8.4
  • freerdp AlmaLinux 10 2:3.10.3-12.el10_2.6
  • libwinpr AlmaLinux 10 2:3.10.3-12.el10_2.6

almalinux advisories ALSA-2026:38501ALSA-2026:37207ALSA-2026:36203

  • freerdp Rocky Linux 8 2:2.11.7-10.el8_10
  • freerdp Rocky Linux 9 2:2.11.7-7.el9_8.4
  • freerdp Rocky Linux 10 2:3.10.3-12.el10_2.6

rocky linux advisories RLSA-2026:38501RLSA-2026:37207RLSA-2026:36203

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-2026-45700 updated cvss 8.8

freerdp: FreeRDP: Out-of-bounds write in planar bitmap decoder allows arbitrary code execution

  • 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.9.6) freerdp-devel 2.11.7-1.el9_6.11, libwinpr-devel 2.11.7-1.el9_6.11, freerdp-debuginfo 2.11.7-1.el9_6.11, libwinpr-debuginfo 2.11.7-1.el9_6.11, freerdp-debugsource 2.11.7-1.el9_6.11, freerdp-libs-debuginfo 2.11.7-1.el9_6.11
    fixed: vendor fix RHSA-2026:47049
  • Red Hat Enterprise Linux AppStream (v. 8) freerdp 2.11.7-10.el8_10, libwinpr 2.11.7-10.el8_10, freerdp-libs 2.11.7-10.el8_10
    fixed: vendor fix RHSA-2026:38501
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.7-7.el9_8.4, libwinpr 2.11.7-7.el9_8.4, freerdp-libs 2.11.7-7.el9_8.4
    fixed: vendor fix RHSA-2026:37207
  • Red Hat Enterprise Linux AppStream (v. 10) freerdp 3.10.3-12.el10_2.6, libwinpr 3.10.3-12.el10_2.6, freerdp-libs 3.10.3-12.el10_2.6
    fixed: vendor fix RHSA-2026:36203
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) freerdp 2.2.0-14.el8_4.1, libwinpr 2.2.0-14.el8_4.1, freerdp-libs 2.2.0-14.el8_4.1
    fixed: vendor fix RHSA-2026:46384
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) freerdp 2.2.0-7.el8_6.9, libwinpr 2.2.0-7.el8_6.9, freerdp-libs 2.2.0-7.el8_6.9
    fixed: vendor fix RHSA-2026:46389
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) freerdp 2.2.0-12.el8_8.9, libwinpr 2.2.0-12.el8_8.9, freerdp-libs 2.2.0-12.el8_8.9
    fixed: vendor fix RHSA-2026:46388
show 12 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) freerdp 2.4.1-6.el9_2.10, libwinpr 2.4.1-6.el9_2.10, freerdp-libs 2.4.1-6.el9_2.10
    fixed: vendor fix RHSA-2026:47048
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) freerdp 2.11.2-1.el9_4.9, libwinpr 2.11.2-1.el9_4.9, freerdp-libs 2.11.2-1.el9_4.9
    fixed: vendor fix RHSA-2026:46383
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) freerdp 3.10.3-3.el10_0.9, libwinpr 3.10.3-3.el10_0.9, freerdp-libs 3.10.3-3.el10_0.9
    fixed: vendor fix RHSA-2026:46393
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) freerdp 2.11.7-1.el9_6.11, libwinpr 2.11.7-1.el9_6.11, freerdp-libs 2.11.7-1.el9_6.11
    fixed: vendor fix RHSA-2026:47049
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) freerdp 2.2.0-14.el8_4.1, libwinpr 2.2.0-14.el8_4.1, freerdp-libs 2.2.0-14.el8_4.1
    fixed: vendor fix RHSA-2026:46384
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) freerdp 2.2.0-7.el8_6.9, libwinpr 2.2.0-7.el8_6.9, freerdp-libs 2.2.0-7.el8_6.9
    fixed: vendor fix RHSA-2026:46389
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) freerdp 2.2.0-12.el8_8.9, libwinpr 2.2.0-12.el8_8.9, freerdp-libs 2.2.0-12.el8_8.9
    fixed: vendor fix RHSA-2026:46388
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel 2.11.7-7.el9_8.4, libwinpr-devel 2.11.7-7.el9_8.4, freerdp-debuginfo 2.11.7-7.el9_8.4, libwinpr-debuginfo 2.11.7-7.el9_8.4, freerdp-debugsource 2.11.7-7.el9_8.4, freerdp-libs-debuginfo 2.11.7-7.el9_8.4
    fixed: vendor fix RHSA-2026:37207
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-server 3.10.3-12.el10_2.6
    fixed: vendor fix RHSA-2026:36203
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) freerdp-server 3.10.3-3.el10_0.9
    fixed: vendor fix RHSA-2026:46393
  • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel 2.11.7-10.el8_10, freerdp-debuginfo 2.11.7-10.el8_10, libwinpr-debuginfo 2.11.7-10.el8_10, freerdp-debugsource 2.11.7-10.el8_10, freerdp-libs-debuginfo 2.11.7-10.el8_10
    fixed: vendor fix RHSA-2026:38501
  • Red Hat Enterprise Linux Server (v. 7 ELS) freerdp 2.1.1-5.el7_9.10, libwinpr 2.1.1-5.el7_9.10, freerdp-libs 2.1.1-5.el7_9.10 Red Hat Enterprise Linux Server Optional (v. 7 ELS) freerdp-devel 2.1.1-5.el7_9.10, libwinpr-devel 2.1.1-5.el7_9.10, freerdp-debuginfo 2.1.1-5.el7_9.10
    fixed: vendor fix RHSA-2026:47201

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
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
5 mo ago

Exploit prediction

6.10% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mpxh-8fq3-x8mh referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 4.0 7.7 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/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
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • FreeRDP FreeRDP
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness

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.