CVE-2021-20269 (GCVE-0-2021-20269)
Vulnerability from cvelistv5 – Published: 2022-03-09 16:29 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47.
Severity
5.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1934261 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | kexec-tools |
Affected:
Fedora kexec-tools versions prior to 2.0.21-8 and RHEL kexec-tools versions prior to 2.0.20-47
|
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T17:37:23.203Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934261"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "kexec-tools",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fedora kexec-tools versions prior to 2.0.21-8 and RHEL kexec-tools versions prior to 2.0.20-47"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-276",
"description": "CWE-276",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-03-09T16:29:47.000Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934261"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2021-20269",
"datePublished": "2022-03-09T16:29:47.000Z",
"dateReserved": "2020-12-17T00:00:00.000Z",
"dateUpdated": "2024-08-03T17:37:23.203Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2021-20269",
"date": "2026-10-01",
"epss": "0.00252",
"percentile": "0.15085"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "kexec-tools",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fedora kexec-tools versions prior to 2.0.21-8 and RHEL kexec-tools versions prior to 2.0.20-47"
}
]
}
],
"source": "secalert@redhat.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:kexec-tools_project:kexec-tools:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1922DFF4-341A-4C43-B3CE-6D76A77BCE28",
"versionEndExcluding": "2.0.21-8",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:fedoraproject:fedora:-:*:*:*:*:*:*:*",
"matchCriteriaId": "D3FEADDA-2AEE-4F65-9401-971B585664A8",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:kexec-tools_project:kexec-tools:*:*:*:*:*:*:*:*",
"matchCriteriaId": "803FD25F-B044-4A48-8C33-A9D9A472112B",
"versionEndExcluding": "2.0.20-47",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
},
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:redhat:enterprise_linux:-:*:*:*:*:*:*:*",
"matchCriteriaId": "3F7347E2-C2A4-4230-A1BC-F6FE93943D4F",
"vulnerable": false
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the permissions of a log file created by kexec-tools. This flaw allows a local unprivileged user to read this file and leak kernel internal information from a previous panic. The highest threat from this vulnerability is to confidentiality. This flaw affects kexec-tools shipped by Fedora versions prior to 2.0.21-8 and RHEL versions prior to 2.0.20-47."
},
{
"lang": "es",
"value": "Se ha encontrado un fallo en los permisos de un archivo de registro creado por kexec-tools. Este fallo permite a un usuario local no privilegiado leer este archivo y filtrar informaci\u00f3n interna del kernel de un p\u00e1nico anterior. La mayor amenaza de esta vulnerabilidad es la confidencialidad. Este fallo afecta a kexec-tools distribuido por Fedora versiones anteriores a 2.0.21-8 y versiones de RHEL anteriores a 2.0.20-47"
}
],
"id": "CVE-2021-20269",
"lastModified": "2026-06-17T03:33:34.710",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "LOW",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 2.1,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"version": "2.0"
},
"exploitabilityScore": 3.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2022-03-10T17:41:27.460",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934261"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1934261"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-276"
}
],
"source": "nvd@nist.gov",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-28T07:42:41+00:00",
"cve": "CVE-2021-20269",
"id": "CVE-2021-20269",
"initial_release_date": "2021-03-02T00:00:00+00:00",
"product_status:fixed": "13",
"product_status:known_affected": "6",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kexec-tools: incorrect permissions on kdump dmesg file",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-20269.json",
"version": "3"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…