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Fencer Intel
high 7.1

CVE-2026-109242 json

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 Uninitialized Heap Disclosure via Progressive Codec Tile Upgrade

published 28d ago modified 6d ago also EUVD-2026-97686

cvss
7.1
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 22%
public exploits
0
none known

Summary

FreeRDP before 3.0.0 and 3.6.0 before 3.32.0 renders uninitialized heap memory from un-decoded progressive tiles because the tile->current buffer is allocated without zeroing. A malicious RDP server can send a crafted WBT_TILE_FIRST then WBT_TILE_UPGRADE sequence to paint heap bytes onscreen or abort the client process.

Patch / fix

  • FreeRDP FreeRDP 3.0.0, 3.32.0
  • freerdp3 Debian 14 3.32.0+dfsg-1

debian advisories DEBIAN-CVE-2026-109242

  • freerdp3 Ubuntu 24.04 LTS 3.32.0+dfsg-0ubuntu0.24.04.1
  • freerdp3 Ubuntu 26.04 LTS 3.32.0+dfsg-0ubuntu0.26.04.1

ubuntu advisories UBUNTU-CVE-2026-109242

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 8 2:2.11.7-15.el8_10
  • libwinpr AlmaLinux 8 2:2.11.7-15.el8_10
  • freerdp-libs AlmaLinux 8 2:2.11.7-15.el8_10
  • 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
  • freerdp AlmaLinux 9 2:2.11.7-7.el9_8.9

almalinux advisories ALSA-2026:94510ALSA-2026:94514ALSA-2026:93592

  • freerdp Rocky Linux 10 2:3.32.2-1.el10_2
  • freerdp Rocky Linux 8 2:2.11.7-15.el8_10
  • freerdp Rocky Linux 9 2:2.11.7-7.el9_8.9

rocky linux advisories RLSA-2026:94514RLSA-2026:94510RLSA-2026:93592

Is CVE-2026-109242 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-2026-109242 updated cvss 7.1

freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling

  • Red Hat Enterprise Linux 6 freerdp, freerdp-libs, freerdp-plugins Red Hat Enterprise Linux 7 freerdp, libwinpr, freerdp-libs, freerdp-plugins
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) freerdp 2.11.7-15.el8_10, libwinpr 2.11.7-15.el8_10, freerdp-libs 2.11.7-15.el8_10
    fixed: vendor fix RHSA-2026:94510
  • Red Hat Enterprise Linux AppStream (v. 9) freerdp 2.11.7-7.el9_8.9, libwinpr 2.11.7-7.el9_8.9, freerdp-libs 2.11.7-7.el9_8.9
    fixed: vendor fix RHSA-2026:93592
  • 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
    fixed: vendor fix RHSA-2026:94514
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel 2.11.7-7.el9_8.9, libwinpr-devel 2.11.7-7.el9_8.9, freerdp-debuginfo 2.11.7-7.el9_8.9, libwinpr-debuginfo 2.11.7-7.el9_8.9, freerdp-debugsource 2.11.7-7.el9_8.9, freerdp-libs-debuginfo 2.11.7-7.el9_8.9
    fixed: vendor fix RHSA-2026:93592
  • 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 Enterprise Linux CRB (v. 8) freerdp-devel 2.11.7-15.el8_10, freerdp-debuginfo 2.11.7-15.el8_10, libwinpr-debuginfo 2.11.7-15.el8_10, freerdp-debugsource 2.11.7-15.el8_10, freerdp-libs-debuginfo 2.11.7-15.el8_10
    fixed: vendor fix RHSA-2026:94510

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
partial
Assessed
25d ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4mpr-hmqx-83q8 referenced PoC, tagged "exploit" by a source, unverified

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:L/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
CNA 4.0 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/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-908 Use of Uninitialized Resource

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.