CVE-2026-94286 (GCVE-0-2026-94286)
Vulnerability from cvelistv5 – Published: 2026-09-28 08:50 – Updated: 2026-09-28 08:50
VLAI
EPSS
VEX
Title
Out-of-bounds read in libXtst's RECORD reply parser
Summary
An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.
Severity
7.1 (High)
CWE
- CWE-126 - Buffer over-read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libxtst/-… | patch |
Impacted products
Date Public
2026-09-28 08:48
{
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"packageName": "libXtst",
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"vendor": "x.org",
"versions": [
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"lessThan": "1.2.6",
"status": "affected",
"version": "0",
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}
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"cpeApplicability": [
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"operator": "OR"
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"credits": [
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"type": "finder",
"value": "AISLE in partnership with Red Hat"
}
],
"datePublic": "2026-09-28T08:48:00.000Z",
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"value": "\u003cp\u003eAn out-of-bounds read in libXtst\u0027s RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.\u003c/p\u003e\u003cbr\u003e"
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],
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"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540 Overread Buffers"
}
]
}
],
"metrics": [
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"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
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"providerMetadata": {
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"shortName": "suse"
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"references": [
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"tags": [
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"url": "https://gitlab.freedesktop.org/xorg/lib/libxtst/-/merge_requests/10/diffs?commit_id=16023c86070e6af9407330deea3938fcef75815b"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Out-of-bounds read in libXtst\u0027s RECORD reply parser",
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"cveId": "CVE-2026-94286",
"datePublished": "2026-09-28T08:50:35.900Z",
"dateReserved": "2026-09-21T09:33:25.369Z",
"dateUpdated": "2026-09-28T08:50:35.900Z",
"state": "PUBLISHED"
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"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"date": "2026-09-28",
"epss": "0.00185",
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"nvd": {
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"versions": [
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],
"id": "CVE-2026-94286",
"lastModified": "2026-09-28T09:17:08.463",
"metrics": {
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"references": [
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"redhat_vex": {
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"current_release_date": "2026-09-28T09:29:34+00:00",
"cve": "CVE-2026-94286",
"id": "CVE-2026-94286",
"initial_release_date": "2026-09-28T08:50:35.900000+00:00",
"product_status:known_affected": "13",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94286.json",
"version": "3"
}
}
}
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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
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