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Fencer Intel
high 8.8

CVE-2026-45700 json

Heap-buffer-overflow write in planar bitmap decoder

published 5mo ago modified 3mo 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

Is CVE-2026-45700 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.

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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-2026-45700 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
5mo ago

Exploit prediction

6.10% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

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 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.