CVE-2018-20784 (GCVE-0-2018-20784)
Vulnerability from cvelistv5 – Published: 2019-02-22 15:00 – Updated: 2024-08-05 12:12
VLAI
EPSS
VEX
Summary
In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.
Severity
9.8 (Critical)
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/torvalds/linux/commit/c40f7d74… | x_refsource_MISC |
| http://git.kernel.org/cgit/linux/kernel/git/torva… | x_refsource_MISC |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan… | x_refsource_MISC |
| https://access.redhat.com/errata/RHSA-2019:1959 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2019:1971 | vendor-advisoryx_refsource_REDHAT |
| https://usn.ubuntu.com/4115-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://usn.ubuntu.com/4118-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://usn.ubuntu.com/4211-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://usn.ubuntu.com/4211-1/ | vendor-advisoryx_refsource_UBUNTU |
Date Public
2019-02-22 00:00
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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T06:53:39+00:00",
"cve": "CVE-2018-20784",
"id": "CVE-2018-20784",
"initial_release_date": "2018-12-28T00:00:00+00:00",
"product_status:fixed": "154",
"product_status:known_affected": "1",
"product_status:known_not_affected": "55",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: infinite loop in update_blocked_averages() in kernel/sched/fair.c leading to denial of service",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-20784.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-01T23:34:09Z",
"cve": "CVE-2018-20784",
"id": "CVE-2018-20784",
"initial_release_date": "2023-02-15T04:20:51Z",
"product_status:known_not_affected": "491",
"product_status:recommended": "137",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2018-20784",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-20784.json",
"version": "20"
}
}
}
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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.
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.
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