SUSE-SU-2026:0656-1
Vulnerability from csaf_suse - Published: 2026-02-26 15:06 - Updated: 2026-09-16 19:06Summary
Security update for freerdp
Severity
Important
Notes
Title of the patch: Security update for freerdp
Description of the patch: This update for freerdp fixes the following issues:
- CVE-2026-22855: heap-buffer-overflow in smartcard_unpack_set_attrib_call (bsc#1256721).
- CVE-2026-22857: heap-use-after-free in irp_thread_func (bsc#1256723).
- CVE-2026-23533: improper validation can lead to heap buffer overflow in `clear_decompress_residual_data`
(bsc#1256943).
- CVE-2026-23732: improper validation can lead to heap buffer overflow in `Glyph_Alloc` (bsc#1256945).
- CVE-2026-23883: use-after-free when `update_pointer_color` and `freerdp_image_copy_from_pointer_data` fail
(bsc#1256946).
- CVE-2026-23884: use-after-free in `gdi_set_bounds` (bsc#1256947).
Patchnames: SUSE-2026-656,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-656
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
6.8 (Medium)
Affected products
Recommended
6 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.s390x | — |
Vendor Fix
|
Threats
Impact
moderate
7.5 (High)
Affected products
Recommended
6 products, the same list as for
CVE-2026-22855
Threats
Impact
important
7.5 (High)
Affected products
Recommended
6 products, the same list as for
CVE-2026-22855
Threats
Impact
important
4.3 (Medium)
Affected products
Recommended
6 products, the same list as for
CVE-2026-22855
Threats
Impact
moderate
7.5 (High)
Affected products
Recommended
6 products, the same list as for
CVE-2026-22855
Threats
Impact
important
7.5 (High)
Affected products
Recommended
6 products, the same list as for
CVE-2026-22855
Threats
Impact
important
References
28 references
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"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a heap out-of-bounds read occurs in the smartcard SetAttrib path when cbAttrLen does not match the actual NDR buffer length. This vulnerability is fixed in 3.20.1.",
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{
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"ids": [
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"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-23884"
}
],
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{
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"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, offscreen bitmap deletion leaves `gdi-\u003edrawing` pointing to freed memory, causing UAF when related update packets arrive. A malicious server can trigger a client-side use after free, causing a crash (DoS) and potential heap corruption with code-execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.",
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"summary": "CVE-2026-23884",
"url": "https://www.suse.com/security/cve/CVE-2026-23884"
},
{
"category": "external",
"summary": "SUSE Bug 1256947 for CVE-2026-23884",
"url": "https://bugzilla.suse.com/1256947"
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],
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"SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.s390x",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.aarch64",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.ppc64le",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.s390x"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.aarch64",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.ppc64le",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libfreerdp2-2.4.0-150400.3.41.1.s390x",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.aarch64",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.ppc64le",
"SUSE Linux Enterprise Module for Package Hub 15 SP7:libwinpr2-2.4.0-150400.3.41.1.s390x"
]
}
],
"threats": [
{
"category": "impact",
"date": "2026-02-26T15:06:36Z",
"details": "important"
}
],
"title": "CVE-2026-23884"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.