SUSE-SU-2026:22617-1
Vulnerability from csaf_suse - Published: 2026-07-10 08:44 - Updated: 2026-09-16 20:03Summary
Security update for xwayland
Severity
Important
Notes
Title of the patch: Security update for xwayland
Description of the patch: This update for xwayland fixes the following issues
- CVE-2026-55999: missing bounds check in `glamor_font_get` can lead to a heap buffer overflow when a font loaded from
a malicious PCF file is processed (bsc#1268893).
- CVE-2026-56000: improper memory management in `CommonMakeCurrent` can lead to a heap use-after-free when an
interaction with a malicious client creating GLX contexts happens (bsc#1268894).
Patchnames: SUSE-SLES-16.0-1194
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Recommended
16 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-24.1.6-160000.6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-24.1.6-160000.6.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-24.1.6-160000.6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-24.1.6-160000.6.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-devel-24.1.6-160000.6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-devel-24.1.6-160000.6.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-devel-24.1.6-160000.6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 16.0:xwayland-devel-24.1.6-160000.6.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-24.1.6-160000.6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-24.1.6-160000.6.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-24.1.6-160000.6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-24.1.6-160000.6.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-devel-24.1.6-160000.6.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-devel-24.1.6-160000.6.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-devel-24.1.6-160000.6.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP applications 16.0:xwayland-devel-24.1.6-160000.6.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
Affected products
Recommended
16 products, the same list as for
CVE-2026-55999
Threats
Impact
important
References
12 references
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"vulnerabilities": [
{
"cve": "CVE-2026-55999",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-55999"
}
],
"notes": [
{
"category": "general",
"text": "Local attackers with a X connection able to provide PCX fonts to the X \nserver xorg-server before 21.2.24 and xwayland before 24.1.13 could \ncause a heap buffer overflow via SetFont due to missing glyph boundary checks.",
"title": "CVE description"
}
],
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]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-55999",
"url": "https://www.suse.com/security/cve/CVE-2026-55999"
},
{
"category": "external",
"summary": "SUSE Bug 1268893 for CVE-2026-55999",
"url": "https://bugzilla.suse.com/1268893"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"date": "2026-07-10T08:44:49Z",
"details": "important"
}
],
"title": "CVE-2026-55999"
},
{
"cve": "CVE-2026-56000",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-56000"
}
],
"notes": [
{
"category": "general",
"text": "Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.",
"title": "CVE description"
}
],
"product_status": {
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"url": "https://www.suse.com/security/cve/CVE-2026-56000"
},
{
"category": "external",
"summary": "SUSE Bug 1268894 for CVE-2026-56000",
"url": "https://bugzilla.suse.com/1268894"
}
],
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{
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],
"scores": [
{
"cvss_v3": {
"baseScore": 7,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
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"date": "2026-07-10T08:44:49Z",
"details": "important"
}
],
"title": "CVE-2026-56000"
}
]
}
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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.
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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.
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