CVE-2022-48858 (GCVE-0-2022-48858)

Vulnerability from cvelistv5 – Published: 2024-07-16 12:25 – Updated: 2026-08-05 08:52
VLAI
Title
net/mlx5: Fix a race on command flush flow
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix a race on command flush flow Fix a refcount use after free warning due to a race on command entry. Such race occurs when one of the commands releases its last refcount and frees its index and entry while another process running command flush flow takes refcount to this command entry. The process which handles commands flush may see this command as needed to be flushed if the other process released its refcount but didn't release the index yet. Fix it by adding the needed spin lock. It fixes the following warning trace: refcount_t: addition on 0; use-after-free. WARNING: CPU: 11 PID: 540311 at lib/refcount.c:25 refcount_warn_saturate+0x80/0xe0 ... RIP: 0010:refcount_warn_saturate+0x80/0xe0 ... Call Trace: <TASK> mlx5_cmd_trigger_completions+0x293/0x340 [mlx5_core] mlx5_cmd_flush+0x3a/0xf0 [mlx5_core] enter_error_state+0x44/0x80 [mlx5_core] mlx5_fw_fatal_reporter_err_work+0x37/0xe0 [mlx5_core] process_one_work+0x1be/0x390 worker_thread+0x4d/0x3d0 ? rescuer_thread+0x350/0x350 kthread+0x141/0x160 ? set_kthread_struct+0x40/0x40 ret_from_fork+0x1f/0x30 </TASK>
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 073fff8102062cd675170ceb54d90da22fe7e668 , < 1a4017926eeea56c7540cc41b42106746ee8a0ee (git)
Affected: 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 , < f3331bc17449f15832c31823f27573f4c0e13e5f (git)
Affected: 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 , < 7c519f769f555ff7d9d4ccba3497bbb589df360a (git)
Affected: 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 , < 0401bfb27a91d7bdd74b1635c1aae57cbb128da6 (git)
Affected: 50b2412b7e7862c5af0cbf4b10d93bc5c712d021 , < 063bd355595428750803d8736a9bb7c8db67d42d (git)
Affected: da87ea137373689dec9d3fafa34a57787320a4b3 (git)
Affected: 5.4.71 , < 5.4.185 (semver)
Affected: 5.8.15 , < 5.9 (semver)
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Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.4.185 , ≤ 5.4.* (semver)
Unaffected: 5.10.106 , ≤ 5.10.* (semver)
Unaffected: 5.15.29 , ≤ 5.15.* (semver)
Unaffected: 5.16.15 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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Fix it\\nby adding the needed spin lock.\\n\\nIt fixes the following warning trace:\\n\\nrefcount_t: addition on 0; use-after-free.\\nWARNING: CPU: 11 PID: 540311 at lib/refcount.c:25 refcount_warn_saturate+0x80/0xe0\\n...\\nRIP: 0010:refcount_warn_saturate+0x80/0xe0\\n...\\nCall Trace:\\n \u003cTASK\u003e\\n mlx5_cmd_trigger_completions+0x293/0x340 [mlx5_core]\\n mlx5_cmd_flush+0x3a/0xf0 [mlx5_core]\\n enter_error_state+0x44/0x80 [mlx5_core]\\n mlx5_fw_fatal_reporter_err_work+0x37/0xe0 [mlx5_core]\\n process_one_work+0x1be/0x390\\n worker_thread+0x4d/0x3d0\\n ? rescuer_thread+0x350/0x350\\n kthread+0x141/0x160\\n ? set_kthread_struct+0x40/0x40\\n ret_from_fork+0x1f/0x30\\n \u003c/TASK\u003e\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mlx5: Corregir una ejecuci\u00f3n en el flujo de descarga de comandos. Corregir una advertencia de refcount use after free debido a una ejecuci\u00f3n en la entrada de comandos. Dicha ejecuci\u00f3n ocurre cuando uno de los comandos libera su \u00faltimo recuento y libera su \u00edndice y entrada, mientras que otro proceso que ejecuta el flujo de descarga de comandos toma el recuento de esta entrada de comando. El proceso que maneja los comandos de vaciado puede considerar que este comando es necesario para vaciarlo si el otro proceso public\u00f3 su recuento pero a\u00fan no public\u00f3 el \u00edndice. Solucionarlo agregando el bloqueo de giro necesario. Corrige el siguiente seguimiento de advertencia: refcount_t: adici\u00f3n en 0; use-after-free. ADVERTENCIA: CPU: 11 PID: 540311 en lib/refcount.c:25 refcount_warn_saturate+0x80/0xe0... RIP: 0010:refcount_warn_saturate+0x80/0xe0... Seguimiento de llamadas:  mlx5_cmd_trigger_completions+0x293/0x340 [mlx5_core] mlx5_cmd_flush+0x3a/0xf0 [mlx5_core] enter_error_state+0x44/0x80 [mlx5_core] mlx5_fw_fatal_reporter_err_work+0x37/0xe0 [mlx5_core] Process_one_work+0x1be/0x390 trabajador_thread+0x4d/0x3d0 ? hilo_rescate+0x350/0x350 khilo+0x141/0x160 ? set_kthread_struct+0x40/0x40 ret_from_fork+0x1f/0x30 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:46:52+00:00",
      "cve": "CVE-2022-48858",
      "id": "CVE-2022-48858",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/mlx5: Fix a race on command flush flow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-48858.json",
      "version": "3"
    },
    "vulnrichment": {
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.