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TI-2026-78658 Aliases CVE-2026-114045

Heap buffer overflow in FreeRDP server audio channel

Priority MEDIUM 40CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 2 fixed, 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.

Summary

FreeRDP before 3.32.1 contains a heap-based buffer overflow (CWE-122) in the server-side rdpsnd channel. An integer wraparound in rdpsnd_server_select_format() bypasses block-alignment validation for DVI_ADPCM audio. A malicious RDP client can send crafted format messages that cause an unbounded heap write during server audio playback, potentially enabling code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00576 47th percentileScored 2026-11-07
Fix Partial FreeRDP (FreeRDP): 3.32.1Red Hat: 1 advisoryRed Hat: 2 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeRDPFreeRDPbefore 3.32.13.32.1Patch availableCNA
  • FreeRDP VendorFreeRDP Affected before 3.32.1 Fixed in 3.32.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*——FreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions — — ·FreeRDP

Remediation

Update FreeRDP to version 3.32.1. Red Hat has fixed the flaw in Red Hat Enterprise Linux AppStream and CodeReady Linux Builder version 10 in advisory RHSA-2026:94514, but the sources list no fixed version for Red Hat Enterprise Linux 6, 7, 8 and 9.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.1

Red Hat 1 advisory

  • RHSA-2026:94514 Released 2026-11-03 · Red Hat rating Important
    freerdp security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) freerdp-2:3.32.2-1.el10_2, freerdp-libs-2:3.32.2-1.el10_2, libwinpr-2:3.32.2-1.el10_2
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-devel-2:3.32.2-1.el10_2, freerdp-server-2:3.32.2-1.el10_2, libwinpr-devel-2:3.32.2-1.el10_2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FreeRDP 3.32.1

    5 records Highest priority Priority MEDIUM 3 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-78656 Out-of-bounds read in FreeRDP clipboard PNG handlingPriority MEDIUM 64
    • TI-2026-78655 Use-after-free in FreeRDP drdynvc channel crashes clientsPriority MEDIUM 64
    • TI-2026-78657 Heap out-of-bounds read in FreeRDP Android client graphics pipelinePriority LOW 36
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:94514
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:94514

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-114045
  2. 2026-10-21 Affected versions changed · Red Hat
  3. 2026-10-21 CVSS score added · Red Hat
  4. 2026-10-21 CISA SSVC decision points changed
  5. 2026-10-21 Priority changed: MEDIUM → LOW
  6. 2026-10-22 Priority changed: LOW → MEDIUM
  7. 2026-10-22 Affected versions changed · Red Hat
  8. 2026-11-03 Fix available: RHSA-2026:94514 · Red Hat
  9. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat

References

Advisory 1

  • TI-2026-85092 Use-after-free in FreeRDP rdpgfx channel close handling CVSS 4.0CRITICAL 9.3
  • TI-2026-85091 Out-of-bounds write in FreeRDP proxy via bitmap cache v2 capability CVSS 4.0CRITICAL 9.3
  • TI-2026-24435 FreeRDP has a `size_t` underflow in ADPCM decoder leads to heap-buffer-overflow write CVSS 3.1CRITICAL 9.8
  • TI-2023-21373 Out-Of-Bounds Write in FreeRDP CVSS 3.1CRITICAL 9.8
  • TI-2022-08692 Server side NTLM does not properly check parameters in FreeRDP CVSS 3.1CRITICAL 9.1
  • TI-2023-21374 Out-Of-Bounds Read in FreeRDP CVSS 3.1CRITICAL 9.1
See all 346 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences