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TI-2026-62082 Aliases CVE-2026-91947GHSA-chpg-x28q-pmrg

FreeRDP Server before 3.31.0 Use-After-Free via DRDYNVC

Priority LOW 36CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

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

Summary

FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00374 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial FreeRDP (FreeRDP): 3.31.0Red Hat: 2 advisoriesRed Hat: 4 fixed, 1 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
FreeRDPFreeRDP2.0.0 to before 3.31.03.31.0Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 2.0.0 to before 3.31.0 Fixed in 3.31.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*before 3.31.0VulnerableFreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions before 3.31.0 Vulnerable ·FreeRDP

Remediation

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.31.0

Red Hat 2 advisories

  • RHSA-2026:93559 Released 2026-11-02 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) freerdp-2.1.1-5.el7_9.14, freerdp-libs-2.1.1-5.el7_9.14, freerdp-libs-2.1.1-5.el7_9.14.ppc +2
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) freerdp-devel-2.1.1-5.el7_9.14, freerdp-devel-2.1.1-5.el7_9.14.ppc, libwinpr-devel-2.1.1-5.el7_9.14 +1
  • RHSA-2026:75570 Released 2026-10-05 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream (v. 10) freerdp-2:3.10.3-12.el10_2.14, freerdp-libs-2:3.10.3-12.el10_2.14, libwinpr-2:3.10.3-12.el10_2.14
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) freerdp-devel-2:3.10.3-12.el10_2.14, freerdp-server-2:3.10.3-12.el10_2.14, libwinpr-devel-2:3.10.3-12.el10_2.14

Fixed in the same release

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

  • Release ·

    FreeRDP 3.31.0

    20 records Highest priority Priority HIGH 1 HIGH, 12 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-62090 FreeRDP before 3.31.0 Denial of Service via Desktop DimensionsPriority HIGH 75
    • TI-2026-62098 FreeRDP 2.0.0 through 3.30.0 Uninitialized Heap Memory Disclosure via urbdrcPriority MEDIUM 64
    • TI-2026-62095 FreeRDP before 3.31.0 Integer Overflow Double FreePriority MEDIUM 64
    Show all 20 records →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:75570
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:75570
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:93559
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:93559
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91947
  2. 2026-10-03 Alias added: GHSA-chpg-x28q-pmrg
  3. 2026-10-05 Fix available: RHSA-2026:75570 · Red Hat
  4. 2026-10-05 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  5. 2026-10-29 Affected versions changed · Red Hat
  6. 2026-11-02 Fix available: RHSA-2026:93559 · Red Hat
  7. 2026-11-02 Fix available: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS) · Red Hat

References

Exploit 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 336 →

Sources

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