RHSA-2021:4326
Vulnerability from csaf_opensuse - Published: 2021-11-09 00:00 - Updated: 2026-09-20 11:17Summary
security update for libX11
Severity
Moderate
Notes
Title of the patch: security update for libX11
Description of the patch: This security update provides a functional equivalent of RHSA-2021:4326.
The original Red Hat(R) advisory is available from the Red Hat web site at
https://access.redhat.com/errata/RHSA-2021:4326.
Patchnames: RHSA-2021:4326
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
8.1 (High)
Affected products
Recommended
7 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-common-0:1.6.8-5.el8.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-devel-0:1.6.8-5.el8.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-devel-0:1.6.8-5.el8.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.i686 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
7 references
| URL | Category |
|---|---|
| https://www.suse.com/support/security/rating/ | external |
| https://ftp.suse.com/pub/projects/security/csaf/r… | self |
| https://www.suse.com/security/cve/CVE-2021-31535/ | self |
| https://www.suse.com/security/cve/CVE-2021-31535 | external |
| https://bugzilla.suse.com/1182506 | external |
| https://bugzilla.suse.com/1191879 | external |
| https://bugzilla.suse.com/1205051 | external |
{
"document": {
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"text": "Moderate"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright 2024 SUSE LLC. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "security update for libX11",
"title": "Title of the patch"
},
{
"category": "description",
"text": "This security update provides a functional equivalent of RHSA-2021:4326.\nThe original Red Hat(R) advisory is available from the Red Hat web site at\nhttps://access.redhat.com/errata/RHSA-2021:4326.\n",
"title": "Description of the patch"
},
{
"category": "details",
"text": "RHSA-2021:4326",
"title": "Patchnames"
},
{
"category": "legal_disclaimer",
"text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
"title": "Terms of use"
}
],
"publisher": {
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{
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"url": "https://www.suse.com/support/security/rating/"
},
{
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"summary": "URL of this CSAF notice",
"url": "https://ftp.suse.com/pub/projects/security/csaf/rhsa-2021_4326.json"
},
{
"category": "self",
"summary": "SUSE CVE CVE-2021-31535 page",
"url": "https://www.suse.com/security/cve/CVE-2021-31535/"
}
],
"title": "security update for libX11",
"tracking": {
"current_release_date": "2026-09-20T11:17:37Z",
"generator": {
"date": "2021-11-09T00:00:00Z",
"engine": {
"name": "cve-database.git:bin/generate-csaf.pl",
"version": "1"
}
},
"id": "RHSA-2021:4326",
"initial_release_date": "2021-11-09T00:00:00Z",
"revision_history": [
{
"date": "2021-11-09T00:00:00Z",
"number": "1",
"summary": "Current version"
},
{
"date": "2026-09-20T11:17:37Z",
"number": "2",
"summary": "unknown changes"
}
],
"status": "final",
"version": "2"
}
},
"product_tree": {
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{
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{
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"cpe": "cpe:2.3:a:x.org:libx11:1.6.8:*:*:*:*:*:*:*",
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{
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"product_id": "libX11-devel-0:1.6.8-5.el8.x86_64",
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},
{
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"product_id": "libX11-xcb-0:1.6.8-5.el8.x86_64",
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"relationships": [
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},
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},
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},
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},
"vulnerabilities": [
{
"cve": "CVE-2021-31535",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2021-31535"
}
],
"notes": [
{
"category": "general",
"text": "LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.",
"title": "CVE description"
}
],
"product_status": {
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"SUSE Liberty Linux 8:libX11-common-0:1.6.8-5.el8.noarch",
"SUSE Liberty Linux 8:libX11-devel-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-devel-0:1.6.8-5.el8.x86_64",
"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.x86_64"
]
},
"references": [
{
"category": "external",
"summary": "CVE-2021-31535",
"url": "https://www.suse.com/security/cve/CVE-2021-31535"
},
{
"category": "external",
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"url": "https://bugzilla.suse.com/1182506"
},
{
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"summary": "SUSE Bug 1191879 for CVE-2021-31535",
"url": "https://bugzilla.suse.com/1191879"
},
{
"category": "external",
"summary": "SUSE Bug 1205051 for CVE-2021-31535",
"url": "https://bugzilla.suse.com/1205051"
}
],
"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": [
"SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.x86_64",
"SUSE Liberty Linux 8:libX11-common-0:1.6.8-5.el8.noarch",
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"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.x86_64"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.1,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"products": [
"SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-0:1.6.8-5.el8.x86_64",
"SUSE Liberty Linux 8:libX11-common-0:1.6.8-5.el8.noarch",
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"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.i686",
"SUSE Liberty Linux 8:libX11-xcb-0:1.6.8-5.el8.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"date": "2021-11-09T00:00:00Z",
"details": "important"
}
],
"title": "CVE-2021-31535"
}
]
}
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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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