FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing
cve CVE-2026-67296 2 sources, 2 claims · Watch
- Severity they disagree
- HIGH NVDmoderate Red Hat
- CVSS they disagree
- 7.5 NVD6.5 Red Hat
- Fixed in
- 3.29.0 NVD
- Vendor
- FreeRDP NVD
- Product
- FreeRDP NVD
- CWE
- CWE-20 NVDCWE-20 Red Hat
How far exploitation has got
- No public code known
- Proof of concept
- Proof of concept, verified
- A Metasploit module
- Exploited in the wild
- Used in ransomware campaigns
Why the CVSS differs
| Metric | NVD | Red Hat |
|---|---|---|
| Attack vector AV | network N | network N |
| Attack complexity AC | low L | low L |
| Privileges required PR | none N | low L |
| User interaction UI | none N | none N |
| Scope S | unchanged U | unchanged U |
| Confidentiality C | none N | none N |
| Integrity I | none N | none N |
| Availability A | high H | high H |
Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.
Timeline
| 2026-08-01 | first spoke of it: FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server. | NVD |
| 2026-08-01 | first spoke of it: FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing | Red Hat |
What it is to other things
| affects | freerdp/freerdp NVD |
| made_by | freerdp NVD |
Every value, with what each source said and its receipt
| Property | Source | Said | Means here | ||||
|---|---|---|---|---|---|---|---|
| Automatable automatable | NVD | yes An attacker can reliably run all of the kill chain's first four steps without a person. receipt
What the source handed over{
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} | — | ||||
| CVSS cvss conflict | NVD | 7.5receipt
What the source handed over{
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} | — | ||||
| CVSS cvss conflict | Red Hat | 6.5receipt
What the source handed over{
"CVE": "CVE-2026-67296",
"CWE": "CWE-20",
"advisories": [
"RHSA-2026:61378",
"RHSA-2026:68706"
],
"affected_packages": [
"freerdp-2:3.10.3-12.el10_2.10",
"freerdp-2:3.10.3-3.el10_0.16"
],
"bugzilla": "2510029",
"bugzilla_description": "FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing",
"cvss3_score": "6.5",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"cvss_score": null,
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"package_state": null,
"public_date": "2026-08-01T12:22:17Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-67296.json",
"severity": "moderate"
} | — | ||||
| Cvss4 cvss4 | NVD | 8.7receipt
What the source handed over{
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| Cvss4 vector cvss4_vector | NVD | 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:Xreceipt
What the source handed over{
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| CVSS vector cvss_vector not compared | NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hreceipt
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| CVSS vector cvss_vector not compared | Red Hat | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hreceipt
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} | — | ||||
| CWE cwe | NVD | CWE-20receipt
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| CWE cwe | Red Hat | CWE-20receipt
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} | — | ||||
| Exploitation exploitation | NVD | poc A public proof of concept exists, or exploitation is trivial. receipt
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} | — | ||||
| Fixed in fixed_in | NVD | 3.29.0receipt
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| Packages packages | Red Hat | freerdp-2:3.10.3-12.el10_2.10, freerdp-2:3.10.3-3.el10_0.16receipt
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| Product product | NVD | FreeRDPreceipt
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| Severity severity conflict | NVD | HIGH From 7.0 to 8.9. receipt
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| Severity severity conflict | Red Hat | moderate A flaw that is harder to exploit, or whose impact is limited. receipt
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| Status status | NVD | Analyzedreceipt
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}
} | — | ||||
| Technical impact technical_impact | NVD | partial The attacker gains limited control, or limited information. receipt
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} | — | ||||
| Vendor vendor | NVD | FreeRDPreceipt
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} | — |
Every claim, by kind
vulnerability
| FreeRDP: FreeRDP: Denial of Service due to RDPEI message processing zetlyn/cve-redhat · 2026-08-01 | cvss 6.5 cvss_vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H cwe CWE-20 packages freerdp-2:3.10.3-12.el10_2.10, freerdp-2:3.10.3-3.el10_0.16 severity moderate | source |
| FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server. zetlyn/cve-nvd · 2026-08-01 | automatable yes cvss 7.5 cvss4 8.7 cvss4_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 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H cwe CWE-20 exploitation poc fixed_in 3.29.0 product FreeRDP severity HIGH status Analyzed technical_impact partial vendor FreeRDP | source |