RHSA-2023:0854
Vulnerability from csaf_redhat - Published: 2023-02-21 09:01 - Updated: 2026-06-28 12:38Summary
Red Hat Security Advisory: kernel-rt security and bug fix update
Severity
Important
Notes
Topic: An update for kernel-rt is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. 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: mm/mremap.c use-after-free vulnerability (CVE-2022-41222)
* kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)
* kernel: an out-of-bounds vulnerability in i2c-ismt driver (CVE-2022-2873)
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):
* RHEL8-RT: Backport use of a dedicate thread for timer wakeups (BZ#2127204)
* SNO Crashed twice - kernel BUG at lib/list_debug.c:28 (BZ#2132062)
* Cannot trigger kernel dump using NMI on SNO node running PAO and RT kernel [RT-8] (BZ#2139851)
* scheduling while atomic in fpu_clone() -> fpu_inherit_perms() (BZ#2154469)
* The latest RHEL 8.7.z2 kernel changes need to be merged into the RT source tree to keep source parity between the two kernels. (BZ#2159806)
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.
An out-of-bounds memory access flaw was found in the Linux kernel Intel’s iSMT SMBus host controller driver in the way a user triggers the I2C_SMBUS_BLOCK_DATA (with the ioctl I2C_SMBUS) with malicious input data. This flaw allows a local user to crash the system.
6.2 (Medium)
Affected products
Fixed
30 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-0:4.18.0-425.13.1.rt7.223.el8_7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-core-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-core-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-debuginfo-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-devel-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-kvm-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-modules-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debug-modules-extra-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debuginfo-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-debuginfo-common-x86_64-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-devel-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-kvm-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-modules-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: NFV-8.7.0.Z.MAIN:kernel-rt-modules-extra-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-0:4.18.0-425.13.1.rt7.223.el8_7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-core-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-core-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-debuginfo-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-devel-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-modules-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debug-modules-extra-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debuginfo-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-debuginfo-common-x86_64-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-devel-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-modules-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: RT-8.7.0.Z.MAIN:kernel-rt-modules-extra-0:4.18.0-425.13.1.rt7.223.el8_7.x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A use-after-free flaw was found in the Linux kernel’s mm/mremap memory address space accounting source code in how a race condition happens between rmap walk and mremap. This flaw allows a local user to crash or potentially escalate their privileges on the system.
7.0 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-2873
Threats
Impact
Important
A buffer overflow flaw was found in the Linux kernel nfsd (network file system) subsystem. The way a user sends RPC over TCP with excess data added at the end of the message could allow a remote user to starve the resources, causing a denial of service.
7.5 (High)
Affected products
Fixed
30 products, the same list as for
CVE-2022-2873
Threats
Impact
Important
References
21 references
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"text": "An out-of-bounds memory access flaw was found in the Linux kernel Intel\u2019s iSMT SMBus host controller driver in the way a user triggers the I2C_SMBUS_BLOCK_DATA (with the ioctl I2C_SMBUS) with malicious input data. This flaw allows a local user to crash the system.",
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"text": "kernel: an out-of-bounds vulnerability in i2c-ismt driver",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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{
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"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"title": "kernel: nfsd buffer overflow by RPC message over TCP with garbage data"
}
]
}
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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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