Vulnerability-Lookup

RHSA-2020:2777

Vulnerability from csaf_redhat - Published: 2020-07-01 10:09 - Updated: 2026-06-28 12:16

Summary

Red Hat Security Advisory: kernel-rt security and bug fix update

Severity

Moderate

Notes

Topic: An update for kernel-rt is now available for Red Hat Enterprise MRG 2. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS (CVE-2018-20169) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1837733) * kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) [mrg-2.5.z] (BZ#1840691)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2018-20169

A flaw was discovered in the Linux kernel's USB subsystem in the __usb_get_extra_descriptor() function in the drivers/usb/core/usb.c which mishandles a size check during the reading of an extra descriptor data. By using a specially crafted USB device which sends a forged extra descriptor, an unprivileged user with physical access to the system can potentially cause a privilege escalation or trigger a system crash or lock up and thus to cause a denial of service (DoS).

6.4 (Medium)


                
                  CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-787 - Out-of-bounds Write

Affected products

Fixed 16 products

Product	Version	Remediation
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.69.1.rt56.667.el6rt.src	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-debuginfo-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debug-devel-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debuginfo-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-debuginfo-common-x86_64-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-devel-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-doc-1:3.10.0-693.69.1.rt56.667.el6rt.noarch	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-firmware-1:3.10.0-693.69.1.rt56.667.el6rt.noarch	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-debuginfo-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-trace-devel-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-debuginfo-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix
Unresolved product id: 6Server-MRG-Realtime-2:kernel-rt-vanilla-devel-1:3.10.0-693.69.1.rt56.667.el6rt.x86_64	—	Vendor Fix fix

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2020:2777	self
https://access.redhat.com/security/updates/classi…	external
https://access.redhat.com/solutions/5142691	external
https://bugzilla.redhat.com/show_bug.cgi?id=1660385	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2018-20169	self
https://bugzilla.redhat.com/show_bug.cgi?id=1660385	external
https://www.cve.org/CVERecord?id=CVE-2018-20169	external
https://nvd.nist.gov/vuln/detail/CVE-2018-20169	external

JSON

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}

CVE-2018-20169 (GCVE-0-2018-20169)

Vulnerability from cvelistv5 – Published: 2018-12-17 06:00 – Updated: 2024-08-05 11:51

Summary

An issue was discovered in the Linux kernel before 4.19.9. The USB subsystem mishandles size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

12 references

URL	Tags
https://usn.ubuntu.com/3879-2/	vendor-advisoryx_refsource_UBUNTU
http://git.kernel.org/cgit/linux/kernel/git/torva…	x_refsource_MISC
https://usn.ubuntu.com/3879-1/	vendor-advisoryx_refsource_UBUNTU
https://cdn.kernel.org/pub/linux/kernel/v4.x/Chan…	x_refsource_MISC
https://github.com/torvalds/linux/commit/704620af…	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2019…	mailing-listx_refsource_MLIST
https://usn.ubuntu.com/4094-1/	vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/4118-1/	vendor-advisoryx_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2019:3309	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:3517	vendor-advisoryx_refsource_REDHAT

Date Public

2018-12-17 00:00

Show details on NVD website

JSON

To clipboard

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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.

Detection rules are retrieved from Rulezet.

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.

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.