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TI-2026-76089 Aliases CVE-2026-111880GHSA-98x3-97xw-cfqr

Heap out-of-bounds write in FreeRDP NTLM authentication handling

Priority LOW 36CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
Partial Red Hat: 6 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write (CWE-787) in the server NTLM hash-callback path. The path does not validate the MIC offset, so an unauthenticated remote attacker can write 16 zero bytes beyond an allocation by sending a crafted NTLM authentication message.

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

Description from the CNA

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00321 25th percentileScored 2026-11-07
Fix Partial FreeRDP (FreeRDP): 3.32.0Red Hat: 3 advisoriesRed Hat: 6 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeRDPFreeRDP2.0.0 to before 3.32.03.32.0Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 2.0.0 to before 3.32.0 Fixed in 3.32.0 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

Upgrade FreeRDP to version 3.32.0 or later. Red Hat fixes this in RHSA-2026:93592 for Red Hat Enterprise Linux 9, RHSA-2026:94510 for Red Hat Enterprise Linux 8 and RHSA-2026:94514 for Red Hat Enterprise Linux 10. Red Hat Enterprise Linux 7 is affected, and Red Hat lists no available plan for it.

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

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.32.0

Red Hat 3 advisories

  • RHSA-2026:94510 Released 2026-11-03 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream (v. 8) freerdp-2:2.11.7-15.el8_10, freerdp-libs-2:2.11.7-15.el8_10, libwinpr-2:2.11.7-15.el8_10 +1
    • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel-2:2.11.7-15.el8_10
  • 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
  • RHSA-2026:93592 Released 2026-11-02 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream (v. 9) freerdp-2:2.11.7-7.el9_8.9, freerdp-libs-2:2.11.7-7.el9_8.9, libwinpr-2:2.11.7-7.el9_8.9
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel-2:2.11.7-7.el9_8.9, libwinpr-devel-2:2.11.7-7.el9_8.9

Fixed in the same release

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

  • Release ·

    FreeRDP 3.32.0

    2 records Highest priority Priority HIGH 1 HIGH, 1 LOW

    Other records, highest priority first

    • TI-2026-76090 Integer underflow in FreeRDP BMP writer lets clipboard peers crash clientsPriority HIGH 65
    Show all 2 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:94514
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:94510
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:93592
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:94510
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:94514
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:93592
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-111880
  2. 2026-10-18 Alias added: GHSA-98x3-97xw-cfqr
  3. 2026-10-18 Priority changed: MEDIUM → LOW
  4. 2026-10-19 Affected versions changed · Red Hat
  5. 2026-10-19 CVSS score added · Red Hat
  6. 2026-10-19 CISA SSVC decision points changed
  7. 2026-10-20 Affected versions changed · Red Hat
  8. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  9. 2026-11-03 Fix available: RHSA-2026:93592 · Red Hat
  10. 2026-11-03 Fix available: RHSA-2026:94510 · Red Hat
  11. 2026-11-03 Fix available: RHSA-2026:94514 · Red Hat
  12. 2026-11-03 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) +1 · 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