CVE-2022-50206 (GCVE-0-2022-50206)
Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2026-08-15 12:23
VLAI
EPSS
VEX
Title
arm64: fix oops in concurrently setting insn_emulation sysctls
Summary
In the Linux kernel, the following vulnerability has been resolved:
arm64: fix oops in concurrently setting insn_emulation sysctls
emulation_proc_handler() changes table->data for proc_dointvec_minmax
and can generate the following Oops if called concurrently with itself:
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010
| Internal error: Oops: 96000006 [#1] SMP
| Call trace:
| update_insn_emulation_mode+0xc0/0x148
| emulation_proc_handler+0x64/0xb8
| proc_sys_call_handler+0x9c/0xf8
| proc_sys_write+0x18/0x20
| __vfs_write+0x20/0x48
| vfs_write+0xe4/0x1d0
| ksys_write+0x70/0xf8
| __arm64_sys_write+0x20/0x28
| el0_svc_common.constprop.0+0x7c/0x1c0
| el0_svc_handler+0x2c/0xa0
| el0_svc+0x8/0x200
To fix this issue, keep the table->data as &insn->current_mode and
use container_of() to retrieve the insn pointer. Another mutex is
used to protect against the current_mode update but not for retrieving
insn_emulation as table->data is no longer changing.
Severity
5.5 (Medium)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
587064b610c703f259317d00dc37bf6d40f4fc74 , < 9d5fec6ba2e4117d196a8259ab54615ffe562460
(git)
Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < b51881b1da57fe9877125dfdd0aac5172958fcfd (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < 04549063d5701976034d8c2bfda3d3a8cbf0409f (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < 353b4673d01c512303c45cf2346f630cda73b5c9 (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < cc69ef95988b9ef2fc730ec452a7441efb90ef5e (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < 6a2fd114678d7fc1b5a0f8865ae98f1c17787455 (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < 07022e07017ee5540f5559b0aeb916e8383c1e1a (git) Affected: 587064b610c703f259317d00dc37bf6d40f4fc74 , < af483947d472eccb79e42059276c4deed76f99a6 (git) |
guessed | |
| Linux | Linux |
Affected:
3.19
Unaffected: 0 , < 3.19 (semver) Unaffected: 4.14.291 , ≤ 4.14.* (semver) Unaffected: 4.19.256 , ≤ 4.19.* (semver) Unaffected: 5.4.211 , ≤ 5.4.* (semver) Unaffected: 5.10.137 , ≤ 5.10.* (semver) Unaffected: 5.15.61 , ≤ 5.15.* (semver) Unaffected: 5.18.18 , ≤ 5.18.* (semver) Unaffected: 5.19.2 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix) |
guessed |
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Another mutex is\\nused to protect against the current_mode update but not for retrieving\\ninsn_emulation as table-\u003edata is no longer changing.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: se corrige el error al configurar simult\u00e1neamente sysctls emulation_proc_handler() de insn_emulation y cambia table-\u0026gt;data para proc_dointvec_minmax, que puede generar el siguiente error si se llama simult\u00e1neamente consigo mismo: | No se puede controlar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000010 | Error interno: Oops: 96000006 [#1] SMP | Rastreo de llamadas: | update_insn_emulation_mode+0xc0/0x148 | emulation_proc_handler+0x64/0xb8 | proc_sys_call_handler+0x9c/0xf8 | proc_sys_write+0x18/0x20 | __vfs_write+0x20/0x48 | Para solucionar este problema, mantenga la tabla-\u0026gt;data como \u0026amp;insn-\u0026gt;current_mode y use container_of() para recuperar el puntero insn. Se usa otro mutex para proteger contra la actualizaci\u00f3n de current_mode, pero no para recuperar la emulaci\u00f3n insn, ya que la tabla-\u0026gt;data ya no 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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T21:43:22+00:00",
"cve": "CVE-2022-50206",
"id": "CVE-2022-50206",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "201",
"product_status:known_affected": "22",
"product_status:known_not_affected": "166",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: arm64: fix oops in concurrently setting insn_emulation sysctls",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50206.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-01T01:25:09Z",
"cve": "CVE-2022-50206",
"id": "CVE-2022-50206",
"initial_release_date": "2025-06-19T03:39:06Z",
"product_status:known_affected": "508",
"product_status:known_not_affected": "185",
"product_status:recommended": "256",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50206",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50206.json",
"version": "47"
}
}
}
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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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