CVE-2024-42230 (GCVE-0-2024-42230)
Vulnerability from cvelistv5 – Published: 2024-07-30 07:47 – Updated: 2026-05-11 20:28
VLAI
EPSS
VEX
Title
powerpc/pseries: Fix scv instruction crash with kexec
Summary
In the Linux kernel, the following vulnerability has been resolved:
powerpc/pseries: Fix scv instruction crash with kexec
kexec on pseries disables AIL (reloc_on_exc), required for scv
instruction support, before other CPUs have been shut down. This means
they can execute scv instructions after AIL is disabled, which causes an
interrupt at an unexpected entry location that crashes the kernel.
Change the kexec sequence to disable AIL after other CPUs have been
brought down.
As a refresher, the real-mode scv interrupt vector is 0x17000, and the
fixed-location head code probably couldn't easily deal with implementing
such high addresses so it was just decided not to support that interrupt
at all.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:14 UTC
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
7fa95f9adaee7e5cbb195d3359741120829e488b , < c550679d604798d9fed8a5b2bb5693448a25407c
(git)
Affected: 7fa95f9adaee7e5cbb195d3359741120829e488b , < d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5 (git) Affected: 7fa95f9adaee7e5cbb195d3359741120829e488b , < 8c6506616386ce37e59b2745fc481c6713fae4f3 (git) Affected: 7fa95f9adaee7e5cbb195d3359741120829e488b , < 21a741eb75f80397e5f7d3739e24d7d75e619011 (git) |
guessed | |
| Linux | Linux |
Affected:
5.9
Unaffected: 0 , < 5.9 (semver) Unaffected: 6.1.98 , ≤ 6.1.* (semver) Unaffected: 6.6.39 , ≤ 6.6.* (semver) Unaffected: 6.9.9 , ≤ 6.9.* (semver) Unaffected: 6.10 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Fix scv instruction crash with kexec\n\nkexec on pseries disables AIL (reloc_on_exc), required for scv\ninstruction support, before other CPUs have been shut down. This means\nthey can execute scv instructions after AIL is disabled, which causes an\ninterrupt at an unexpected entry location that crashes the kernel.\n\nChange the kexec sequence to disable AIL after other CPUs have been\nbrought down.\n\nAs a refresher, the real-mode scv interrupt vector is 0x17000, and the\nfixed-location head code probably couldn\u0027t easily deal with implementing\nsuch high addresses so it was just decided not to support that interrupt\nat all."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries: corrige el fallo de la instrucci\u00f3n scv con kexec kexec en pseries desactiva AIL (reloc_on_exc), necesario para el soporte de instrucciones scv, antes de que se apaguen otras CPU. Esto significa que pueden ejecutar instrucciones scv despu\u00e9s de que AIL est\u00e9 desactivado, lo que provoca una interrupci\u00f3n en una ubicaci\u00f3n de entrada inesperada que bloquea el kernel. Cambie la secuencia kexec para deshabilitar AIL despu\u00e9s de que se hayan desactivado otras CPU. Como repaso, el vector de interrupci\u00f3n scv en modo real es 0x17000, y el c\u00f3digo principal de ubicaci\u00f3n fija probablemente no podr\u00eda manejar f\u00e1cilmente la implementaci\u00f3n de direcciones tan altas, por lo que simplemente se decidi\u00f3 no admitir esa interrupci\u00f3n en absoluto."
}
],
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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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