CVE-2022-49613 (GCVE-0-2022-49613)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-11-05 19:49
VLAI
Title
serial: 8250: Fix PM usage_count for console handover
Summary
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: Fix PM usage_count for console handover When console is enabled, univ8250_console_setup() calls serial8250_console_setup() before .dev is set to uart_port. Therefore, it will not call pm_runtime_get_sync(). Later, when the actual driver is going to take over univ8250_console_exit() is called. As .dev is already set, serial8250_console_exit() makes pm_runtime_put_sync() call with usage count being zero triggering PM usage count warning (extra debug for univ8250_console_setup(), univ8250_console_exit(), and serial8250_register_ports()): [ 0.068987] univ8250_console_setup ttyS0 nodev [ 0.499670] printk: console [ttyS0] enabled [ 0.717955] printk: console [ttyS0] printing thread started [ 1.960163] serial8250_register_ports assigned dev for ttyS0 [ 1.976830] printk: console [ttyS0] disabled [ 1.976888] printk: console [ttyS0] printing thread stopped [ 1.977073] univ8250_console_exit ttyS0 usage:0 [ 1.977075] serial8250 serial8250: Runtime PM usage count underflow! [ 1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A [ 1.977812] univ8250_console_setup ttyS0 usage:2 [ 1.978167] printk: console [ttyS0] printing thread started [ 1.978203] printk: console [ttyS0] enabled To fix the issue, call pm_runtime_get_sync() in serial8250_register_ports() as soon as .dev is set for an uart_port if it has console enabled. This problem became apparent only recently because 82586a721595 ("PM: runtime: Avoid device usage count underflows") added the warning printout. I confirmed this problem also occurs with v5.18 (w/o the warning printout, obviously).
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 19:46 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bedb404e91bb2908d9921fc736a518a9d89525fc , < d9cb6fabc90102f9e61fe35bd0160db88f4f53b4 (git)
Affected: bedb404e91bb2908d9921fc736a518a9d89525fc , < 190ce5cdc55d1b66ea582ac2be6fd5a72e3cc486 (git)
Affected: bedb404e91bb2908d9921fc736a518a9d89525fc , < 5df66302f03f87ae8953785a882d78e911f00c55 (git)
Affected: bedb404e91bb2908d9921fc736a518a9d89525fc , < f9b11229b79c0fb2100b5bb4628a101b1d37fbf6 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.132 , ≤ 5.10.* (semver)
Unaffected: 5.15.56 , ≤ 5.15.* (semver)
Unaffected: 5.18.13 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix PM usage_count for console handover\n\nWhen console is enabled, univ8250_console_setup() calls\nserial8250_console_setup() before .dev is set to uart_port. Therefore,\nit will not call pm_runtime_get_sync(). Later, when the actual driver\nis going to take over univ8250_console_exit() is called. As .dev is\nalready set, serial8250_console_exit() makes pm_runtime_put_sync() call\nwith usage count being zero triggering PM usage count warning\n(extra debug for univ8250_console_setup(), univ8250_console_exit(), and\nserial8250_register_ports()):\n\n[    0.068987] univ8250_console_setup ttyS0 nodev\n[    0.499670] printk: console [ttyS0] enabled\n[    0.717955] printk: console [ttyS0] printing thread started\n[    1.960163] serial8250_register_ports assigned dev for ttyS0\n[    1.976830] printk: console [ttyS0] disabled\n[    1.976888] printk: console [ttyS0] printing thread stopped\n[    1.977073] univ8250_console_exit ttyS0 usage:0\n[    1.977075] serial8250 serial8250: Runtime PM usage count underflow!\n[    1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A\n[    1.977812] univ8250_console_setup ttyS0 usage:2\n[    1.978167] printk: console [ttyS0] printing thread started\n[    1.978203] printk: console [ttyS0] enabled\n\nTo fix the issue, call pm_runtime_get_sync() in\nserial8250_register_ports() as soon as .dev is set for an uart_port\nif it has console enabled.\n\nThis problem became apparent only recently because 82586a721595 (\"PM:\nruntime: Avoid device usage count underflows\") added the warning\nprintout. I confirmed this problem also occurs with v5.18 (w/o the\nwarning printout, obviously)."
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: serial: 8250: Se ha corregido el problema de uso de PM para la transferencia de consola. Cuando la consola est\u00e1 habilitada, univ8250_console_setup() calls serial8250_console_setup() before .dev is set to uart_port. Therefore, it will not call pm_runtime_get_sync(). Later, when the actual driver is going to take over univ8250_console_exit() is called. As .dev is already set, serial8250_console_exit() makes pm_runtime_put_sync() call with usage count being zero triggering PM usage count warning (extra debug for univ8250_console_setup(), univ8250_console_exit(), and serial8250_register_ports()): [ 0.068987] univ8250_console_setup ttyS0 nodev [ 0.499670] printk: console [ttyS0] enabled [ 0.717955] printk: console [ttyS0] printing thread started [ 1.960163] serial8250_register_ports assigned dev for ttyS0 [ 1.976830] printk: console [ttyS0] disabled [ 1.976888] printk: console [ttyS0] printing thread stopped [ 1.977073] univ8250_console_exit ttyS0 usage:0 [ 1.977075] serial8250 serial8250: Runtime PM usage count underflow! [ 1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A [ 1.977812] univ8250_console_setup ttyS0 usage:2 [ 1.978167] printk: console [ttyS0] printing thread started [ 1.978203] printk: console [ttyS0] enabled To fix the issue, call pm_runtime_get_sync() in serial8250_register_ports() as soon as .dev is set for an uart_port if it has console enabled. This problem became apparent only recently because 82586a721595 (\"PM: runtime: Avoid device usage count underflows\") agreg\u00f3 la impresi\u00f3n de advertencia. Confirm\u00e9 que este problema tambi\u00e9n ocurre con v5.18 (sin la impresi\u00f3n de advertencia, obviamente)."
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        "id": "CVE-2022-49613",
        "lastModified": "2026-11-05T20:17:07.787",
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            "url": "https://git.kernel.org/stable/c/f9b11229b79c0fb2100b5bb4628a101b1d37fbf6"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T09:56:38+00:00",
      "cve": "CVE-2022-49613",
      "id": "CVE-2022-49613",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "185",
      "product_status:known_not_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: serial: 8250: Fix PM usage_count for console handover",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49613.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49613",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-11-05T19:46:23.198072Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-11-05T19:46:24.112Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/tty/serial/8250/8250_core.c",
                "drivers/tty/serial/serial_core.c",
                "include/linux/serial_core.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "d9cb6fabc90102f9e61fe35bd0160db88f4f53b4",
                  "status": "affected",
                  "version": "bedb404e91bb2908d9921fc736a518a9d89525fc",
                  "versionType": "git"
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                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "5df66302f03f87ae8953785a882d78e911f00c55",
                  "status": "affected",
                  "version": "bedb404e91bb2908d9921fc736a518a9d89525fc",
                  "versionType": "git"
                },
                {
                  "lessThan": "f9b11229b79c0fb2100b5bb4628a101b1d37fbf6",
                  "status": "affected",
                  "version": "bedb404e91bb2908d9921fc736a518a9d89525fc",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/tty/serial/8250/8250_core.c",
                "drivers/tty/serial/serial_core.c",
                "include/linux/serial_core.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.7"
                },
                {
                  "lessThan": "5.7",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.132",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.56",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.18.*",
                  "status": "unaffected",
                  "version": "5.18.13",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.19",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.132",
                      "versionStartIncluding": "5.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.56",
                      "versionStartIncluding": "5.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18.13",
                      "versionStartIncluding": "5.7",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19",
                      "versionStartIncluding": "5.7",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: Fix PM usage_count for console handover\n\nWhen console is enabled, univ8250_console_setup() calls\nserial8250_console_setup() before .dev is set to uart_port. Therefore,\nit will not call pm_runtime_get_sync(). Later, when the actual driver\nis going to take over univ8250_console_exit() is called. As .dev is\nalready set, serial8250_console_exit() makes pm_runtime_put_sync() call\nwith usage count being zero triggering PM usage count warning\n(extra debug for univ8250_console_setup(), univ8250_console_exit(), and\nserial8250_register_ports()):\n\n[    0.068987] univ8250_console_setup ttyS0 nodev\n[    0.499670] printk: console [ttyS0] enabled\n[    0.717955] printk: console [ttyS0] printing thread started\n[    1.960163] serial8250_register_ports assigned dev for ttyS0\n[    1.976830] printk: console [ttyS0] disabled\n[    1.976888] printk: console [ttyS0] printing thread stopped\n[    1.977073] univ8250_console_exit ttyS0 usage:0\n[    1.977075] serial8250 serial8250: Runtime PM usage count underflow!\n[    1.977429] dw-apb-uart.6: ttyS0 at MMIO 0x4010006000 (irq = 33, base_baud = 115200) is a 16550A\n[    1.977812] univ8250_console_setup ttyS0 usage:2\n[    1.978167] printk: console [ttyS0] printing thread started\n[    1.978203] printk: console [ttyS0] enabled\n\nTo fix the issue, call pm_runtime_get_sync() in\nserial8250_register_ports() as soon as .dev is set for an uart_port\nif it has console enabled.\n\nThis problem became apparent only recently because 82586a721595 (\"PM:\nruntime: Avoid device usage count underflows\") added the warning\nprintout. I confirmed this problem also occurs with v5.18 (w/o the\nwarning printout, obviously)."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T19:03:20.267Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/d9cb6fabc90102f9e61fe35bd0160db88f4f53b4"
            },
            {
              "url": "https://git.kernel.org/stable/c/190ce5cdc55d1b66ea582ac2be6fd5a72e3cc486"
            },
            {
              "url": "https://git.kernel.org/stable/c/5df66302f03f87ae8953785a882d78e911f00c55"
            },
            {
              "url": "https://git.kernel.org/stable/c/f9b11229b79c0fb2100b5bb4628a101b1d37fbf6"
            }
          ],
          "title": "serial: 8250: Fix PM usage_count for console handover",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49613",
        "datePublished": "2025-02-26T02:23:34.739Z",
        "dateReserved": "2025-02-26T02:21:30.418Z",
        "dateUpdated": "2026-11-05T19:49:41.012Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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