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TI-2026-62098 Aliases CVE-2026-91963GHSA-v76r-r3hh-2mwm

FreeRDP 2.0.0 through 3.30.0 Uninitialized Heap Memory Disclosure via urbdrc

Priority MEDIUM 64CWE-457Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 14 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-457 and the CVSS impact.

Summary

FreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00665 52nd percentileScored 2026-11-07
Fix Partial FreeRDP (FreeRDP): 3.31.0Red Hat: 7 advisoriesRed Hat: 14 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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 3.0.0; 3.0.0 to before 3.31.03.31.0Patch availableCNA
FreeRDPFreeRDPbefore 3.31.03.31.0Patch availableCNA
  • FreeRDP VendorFreeRDP Affected 2.0.0 to before 3.0.0; 3.0.0 to before 3.31.0 Fixed in 3.31.0 Patch available CNA
  • FreeRDP VendorFreeRDP Affected before 3.31.0 Fixed in 3.31.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*2.0.0 to before 3.31.0VulnerableFreeRDP
  • cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:* Versions 2.0.0 to before 3.31.0 Vulnerable ·FreeRDP

Remediation

  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.31.0
  • Fix · CNA FreeRDP (FreeRDP) Fixed in 3.31.0

Red Hat 7 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-2026:93549 Released 2026-11-02 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) freerdp-2:2.2.0-7.el8_6.14, freerdp-libs-2:2.2.0-7.el8_6.14, libwinpr-2:2.2.0-7.el8_6.14 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) freerdp-2:2.2.0-7.el8_6.14, freerdp-libs-2:2.2.0-7.el8_6.14, libwinpr-2:2.2.0-7.el8_6.14 +1
  • RHSA-2026:93537 Released 2026-11-02 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) freerdp-2:2.2.0-12.el8_8.13, freerdp-libs-2:2.2.0-12.el8_8.13, libwinpr-2:2.2.0-12.el8_8.13 +1
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) freerdp-2:2.2.0-12.el8_8.13, freerdp-libs-2:2.2.0-12.el8_8.13, libwinpr-2:2.2.0-12.el8_8.13 +1
Show 4 more Red Hat advisories
  • RHSA-2026:93538 Released 2026-11-02 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) freerdp-2:2.2.0-14.el8_4.5, freerdp-libs-2:2.2.0-14.el8_4.5, libwinpr-2:2.2.0-14.el8_4.5 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) freerdp-2:2.2.0-14.el8_4.5, freerdp-libs-2:2.2.0-14.el8_4.5, libwinpr-2:2.2.0-14.el8_4.5 +1
  • RHSA-2026:76755 Released 2026-10-08 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream (v. 9) freerdp-2:2.11.7-7.el9_8.8, freerdp-libs-2:2.11.7-7.el9_8.8, libwinpr-2:2.11.7-7.el9_8.8
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) freerdp-devel-2:2.11.7-7.el9_8.8, libwinpr-devel-2:2.11.7-7.el9_8.8
  • RHSA-2026:76747 Released 2026-10-06 · Red Hat rating Important
    freerdp security update
    • Red Hat Enterprise Linux AppStream (v. 8) freerdp-2:2.11.7-14.el8_10, freerdp-libs-2:2.11.7-14.el8_10, libwinpr-2:2.11.7-14.el8_10 +1
    • Red Hat Enterprise Linux CRB (v. 8) freerdp-devel-2:2.11.7-14.el8_10
  • 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-2026-62095 FreeRDP before 3.31.0 Integer Overflow Double FreePriority MEDIUM 64
    • TI-2026-62094 FreeRDP before 3.31.0 Buffer Over-read via RTS GatewayPriority MEDIUM 64
    Show all 20 records →
  • Release ·

    FreeRDP 3.0.0, 3.31.0

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2026-62099 FreeRDP 2.0.0 through 3.30.0 Heap Buffer Overflow via RoutingTokenPriority MEDIUM 41
    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 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:75570
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:76747
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:76755
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:93538
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:93549
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:93537
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:93538
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:93549
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:93537
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:76747
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:75570
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:76755
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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-91963
  2. 2026-10-03 Alias added: GHSA-v76r-r3hh-2mwm
  3. 2026-10-04 EPSS moved to the 50th–90th percentile
  4. 2026-10-05 Fix available: RHSA-2026:75570 · Red Hat
  5. 2026-10-05 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · Red Hat
  6. 2026-10-06 Fix available: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8) · Red Hat
  7. 2026-10-07 Fix available: RHSA-2026:76747 · Red Hat
  8. 2026-10-08 Fix available: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · Red Hat
  9. 2026-10-09 Fix available: RHSA-2026:76755 · Red Hat
  10. 2026-11-02 Fix available: RHSA-2026:93538 · Red Hat
  11. 2026-11-02 Fix available: RHSA-2026:93537 · Red Hat
  12. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) +1 · Red Hat
  13. 2026-11-02 Fix available: RHSA-2026:93549 · Red Hat
  14. 2026-11-02 Fix available: RHSA-2026:93559 · Red Hat
  15. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6), Red Hat Enterprise Linux Server (v. 7 ELS) +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 336 →

Sources

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