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CVE-2022-50206 (GCVE-0-2022-50206)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:03 – Updated: 2026-08-15 12:23
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted 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)
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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)
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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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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.


Detection rules are retrieved from Rulezet.


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.