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CVE-2026-24684· NVD / CVE Program· CNA GitHub_M

FreeRDP has a Heap-use-after-free in play_thread

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.22.0, the RDPSND async playback thread can process queued PDUs after the channel is closed and internal state is freed, leading to a use after free in rdpsnd_treat_wave. This vulnerability is fixed in 3.22.0.

HighCVSS 8.7 · v4.0—No exploit Fix available
Published
Feb 9, 2026
Updated
Jun 17, 2026
EPSS
0.6% · 45th percentile
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Action score

34

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
8.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
freerdpfreerdp

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • freerdp freerdpbefore 3.22.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • FreeRDP FreeRDP

    • < 3.22.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10freerdpbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:10freerdp-develbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:10freerdp-libsbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:10freerdp-serverbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:10libwinprbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:10libwinpr-develbefore 2:3.10.3-5.el10_1.52:3.10.3-5.el10_1.5
AlmaLinux:8freerdpbefore 2:2.11.7-6.el8_102:2.11.7-6.el8_10
AlmaLinux:8freerdp-develbefore 2:2.11.7-6.el8_102:2.11.7-6.el8_10
AlmaLinux:8freerdp-libsbefore 2:2.11.7-6.el8_102:2.11.7-6.el8_10
AlmaLinux:8libwinprbefore 2:2.11.7-6.el8_102:2.11.7-6.el8_10
AlmaLinux:8libwinpr-develbefore 2:2.11.7-6.el8_102:2.11.7-6.el8_10
AlmaLinux:9freerdpbefore 2:2.11.7-1.el9_7.52:2.11.7-1.el9_7.5
AlmaLinux:9freerdp-develbefore 2:2.11.7-1.el9_7.52:2.11.7-1.el9_7.5
AlmaLinux:9freerdp-libsbefore 2:2.11.7-1.el9_7.52:2.11.7-1.el9_7.5
AlmaLinux:9libwinprbefore 2:2.11.7-1.el9_7.52:2.11.7-1.el9_7.5
AlmaLinux:9libwinpr-develbefore 2:2.11.7-1.el9_7.52:2.11.7-1.el9_7.5
Debian:12freerdp2all versions—
Debian:13freerdp3before 3.15.0+dfsg-2.1+deb13u13.15.0+dfsg-2.1+deb13u1
Debian:14freerdp3before 3.22.0+dfsg-13.22.0+dfsg-1
openSUSE:Leap 16.0freerdp2before 2.11.7-bp160.2.12.11.7-bp160.2.1
openSUSE:Tumbleweedfreerdpbefore 3.22.0-1.13.22.0-1.1
openSUSE:Tumbleweedfreerdp2before 2.11.7-5.12.11.7-5.1
Red Hat:enterprise_linux_eus:10.0freerdpbefore 2:3.10.3-3.el10_0.52:3.10.3-3.el10_0.5
Red Hat:enterprise_linux_eus:10.0freerdp-debuginfobefore 2:3.10.3-3.el10_0.52:3.10.3-3.el10_0.5

+96

Other highest-scoring records for the same primary product.

  • CVE-2018-8787FreeRDP prior to version 2.0.0-rc4 contains an Integer Overflow that leads to a Heap-Based Buffer Overflow in function gdi_Bitmap_Decompress
    42Plan
  • CVE-2018-8788FreeRDP prior to version 2.0.0-rc4 contains an Out-Of-Bounds Write of up to 4 bytes in function nsc_rle_decode() that results in a memory co
    41Plan
  • CVE-2018-8786FreeRDP prior to version 2.0.0-rc4 contains an Integer Truncation that leads to a Heap-Based Buffer Overflow in function update_read_bitmap_
    41Plan
  • CVE-2018-8785FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress() that results in a memory corruption a
    41Plan
  • CVE-2018-8784FreeRDP prior to version 2.0.0-rc4 contains a Heap-Based Buffer Overflow in function zgfx_decompress_segment() that results in a memory corr
    41Plan
  • CVE-2024-32460FreeRDP Out-Of-Bounds Read in interleaved_decompress
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
FreeRDP FreeRDP3.22.0 · descriptionVendor (CNA)
almalinux:freerdp2:2.11.7-1.el9_7.5 · AlmaLinux:9Package registry (OSV)
almalinux:freerdp-devel2:2.11.7-1.el9_7.5 · AlmaLinux:9Package registry (OSV)
almalinux:freerdp-libs2:2.11.7-1.el9_7.5 · AlmaLinux:9Package registry (OSV)
almalinux:freerdp-server2:3.10.3-5.el10_1.5 · AlmaLinux:10Package registry (OSV)
almalinux:libwinpr2:2.11.7-1.el9_7.5 · AlmaLinux:9Package registry (OSV)
almalinux:libwinpr-devel2:2.11.7-1.el9_7.5 · AlmaLinux:9Package registry (OSV)
debian:freerdp33.15.0+dfsg-2.1+deb13u1 · Debian:13Package registry (OSV)
opensuse:freerdp2.11.2-150600.4.9.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:freerdp22.11.7-5.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:freerdp2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:freerdp-debuginfo2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:freerdp-debugsource2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:freerdp-devel0:2.1.1-5.el7_9.7 · Red Hat:rhel_els:7Package registry (OSV)
red hat:freerdp-libs2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:freerdp-libs-debuginfo2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:freerdp-server2:3.10.3-12.el10_2.2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:freerdp-server-debuginfo2:3.10.3-12.el10_2.2 · Red Hat:enterprise_linux:10.2Package registry (OSV)
red hat:libwinpr2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:libwinpr-debuginfo2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
red hat:libwinpr-devel2:2.2.0-12.el8_8.5 · Red Hat:rhel_e4s:8.8::appstreamPackage registry (OSV)
rocky linux:freerdp2:2.11.7-1.el9_7.5 · Rocky Linux:9Package registry (OSV)
suse:freerdp2.11.2-150600.4.9.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)
suse:freerdp2.4.0-150400.3.38.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)
suse:freerdp22.11.7-150700.3.8.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-246770 days apartFreeRDP has a heap-buffer-overflow in ecam_encoder_compress_h264
    34Monitor
  • CVE-2026-246780 days apartFreeRDP has a Heap-use-after-free in cam_v4l_stream_capture_thread
    34Monitor
  • CVE-2026-246800 days apartFreeRDP has a heap-use-after-free in update_pointer_new(SDL)
    34Monitor
  • CVE-2026-246810 days apartFreeRDP has a heap-use-after-free in urb_bulk_transfer_cb
    34Monitor
  • CVE-2026-246830 days apartFreeRDP has a heap-use-after-free in ainput_send_input_event
    34Monitor
  • CVE-2026-67299173 days apartFreeRDP before 3.29.0 Use-After-Free via WindowIcon async message
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

c
free(dev->buf);/* ... another thread is still running ... */process(dev->buf);

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records