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Fencer Intel
high 7.5

CVE-2026-23948 json

FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()

published 9mo ago modified 4mo ago also EUVD-2026-6482

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, a NULL pointer dereference vulnerability in rdp_write_logon_info_v2() allows a malicious RDP server to crash FreeRDP proxy by sending a specially crafted LogonInfoV2 PDU with cbDomain=0 or cbUserName=0. This vulnerability is fixed in 3.22.0.

Patch / fix

  • freerdp freerdp 3.22.0
  • freerdp3 Debian 13 3.15.0+dfsg-2.1+deb13u1
  • freerdp3 Debian 14 3.22.0+dfsg-1

debian advisories DEBIAN-CVE-2026-23948

  • freerdp2 Ubuntu 22.04 LTS 2.6.1+dfsg1-3ubuntu2.10
  • freerdp3 Ubuntu 24.04 LTS 3.5.1+dfsg1-0ubuntu1.2
  • freerdp3 Ubuntu 25.10 3.16.0+dfsg-2ubuntu0.1
  • freerdp2 Ubuntu Pro 18.04 LTS 2.2.0+dfsg1-0ubuntu0.18.04.4+esm5
  • freerdp2 Ubuntu Pro 20.04 LTS 2.6.1+dfsg1-0ubuntu0.20.04.2+esm3
  • freerdp2 Ubuntu Pro 24.04 LTS 2.11.5+dfsg1-1ubuntu0.1~esm5

ubuntu advisories UBUNTU-CVE-2026-23948

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

  • freerdp openSUSE Leap 16.0 3.22.0-160000.1.1
  • freerdp openSUSE Tumbleweed 3.22.0-1.1

opensuse advisories openSUSE-SU-2026:20339-1openSUSE-SU-2026:10132-1

  • 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 3.24, Alpine 3.23 3.22.0-r0

alpine advisories ALPINE-CVE-2026-23948

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-2026-23948 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-2026-23948 updated cvss 5.3

freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()

  • 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_4.5, 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
yes
Technical impact
partial
Assessed
8mo ago

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • FreeRDP FreeRDP

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.