CVE-2022-49986 (GCVE-0-2022-49986)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2026-05-11 19:10
VLAI
Title
scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq storvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it doesn't need to make forward progress under memory pressure. Marking this workqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a non-WQ_MEM_RECLAIM workqueue. In the current state it causes the following warning: [ 14.506347] ------------[ cut here ]------------ [ 14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn [ 14.506360] WARNING: CPU: 0 PID: 8 at <-snip->kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130 [ 14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure #91~18.04.1-Ubuntu [ 14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022 [ 14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun [ 14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130 <-snip-> [ 14.506408] Call Trace: [ 14.506412] __flush_work+0xf1/0x1c0 [ 14.506414] __cancel_work_timer+0x12f/0x1b0 [ 14.506417] ? kernfs_put+0xf0/0x190 [ 14.506418] cancel_delayed_work_sync+0x13/0x20 [ 14.506420] disk_block_events+0x78/0x80 [ 14.506421] del_gendisk+0x3d/0x2f0 [ 14.506423] sr_remove+0x28/0x70 [ 14.506427] device_release_driver_internal+0xef/0x1c0 [ 14.506428] device_release_driver+0x12/0x20 [ 14.506429] bus_remove_device+0xe1/0x150 [ 14.506431] device_del+0x167/0x380 [ 14.506432] __scsi_remove_device+0x11d/0x150 [ 14.506433] scsi_remove_device+0x26/0x40 [ 14.506434] storvsc_remove_lun+0x40/0x60 [ 14.506436] process_one_work+0x209/0x400 [ 14.506437] worker_thread+0x34/0x400 [ 14.506439] kthread+0x121/0x140 [ 14.506440] ? process_one_work+0x400/0x400 [ 14.506441] ? kthread_park+0x90/0x90 [ 14.506443] ret_from_fork+0x35/0x40 [ 14.506445] ---[ end trace 2d9633159fdc6ee7 ]---
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < b692c238ddfa61f00d97c4c1f021425d132ba96f (git)
Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < b4c928ace9a123629eeb14ec5d7ee8f73e5ac668 (git)
Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < 46fcb0fc884db78a0384be92cc2a51927e6581b8 (git)
Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < cd2a50d0a097a42b6de283377da98ff757505120 (git)
Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < 828f57ac75eaccd6607ee4d1468d34e983e32c68 (git)
Affected: 436ad941335386c5fc7faa915a8fbdfe8c908084 , < d957e7ffb2c72410bcc1a514153a46719255a5da (git)
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Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 4.19.257 , ≤ 4.19.* (semver)
Unaffected: 5.4.212 , ≤ 5.4.* (semver)
Unaffected: 5.10.140 , ≤ 5.10.* (semver)
Unaffected: 5.15.64 , ≤ 5.15.* (semver)
Unaffected: 5.19.6 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/scsi/storvsc_drv.c"
          ],
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.15"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.4.*",
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              "version": "5.4.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.257",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.212",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.15.64",
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq\n\nstorvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it\ndoesn\u0027t need to make forward progress under memory pressure.  Marking this\nworkqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a\nnon-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following\nwarning:\n\n[   14.506347] ------------[ cut here ]------------\n[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn\n[   14.506360] WARNING: CPU: 0 PID: 8 at \u003c-snip-\u003ekernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130\n[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure #91~18.04.1-Ubuntu\n[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022\n[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun\n[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130\n\t\t\u003c-snip-\u003e\n[   14.506408] Call Trace:\n[   14.506412]  __flush_work+0xf1/0x1c0\n[   14.506414]  __cancel_work_timer+0x12f/0x1b0\n[   14.506417]  ? kernfs_put+0xf0/0x190\n[   14.506418]  cancel_delayed_work_sync+0x13/0x20\n[   14.506420]  disk_block_events+0x78/0x80\n[   14.506421]  del_gendisk+0x3d/0x2f0\n[   14.506423]  sr_remove+0x28/0x70\n[   14.506427]  device_release_driver_internal+0xef/0x1c0\n[   14.506428]  device_release_driver+0x12/0x20\n[   14.506429]  bus_remove_device+0xe1/0x150\n[   14.506431]  device_del+0x167/0x380\n[   14.506432]  __scsi_remove_device+0x11d/0x150\n[   14.506433]  scsi_remove_device+0x26/0x40\n[   14.506434]  storvsc_remove_lun+0x40/0x60\n[   14.506436]  process_one_work+0x209/0x400\n[   14.506437]  worker_thread+0x34/0x400\n[   14.506439]  kthread+0x121/0x140\n[   14.506440]  ? process_one_work+0x400/0x400\n[   14.506441]  ? kthread_park+0x90/0x90\n[   14.506443]  ret_from_fork+0x35/0x40\n[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:10:32.151Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b692c238ddfa61f00d97c4c1f021425d132ba96f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4c928ace9a123629eeb14ec5d7ee8f73e5ac668"
        },
        {
          "url": "https://git.kernel.org/stable/c/46fcb0fc884db78a0384be92cc2a51927e6581b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd2a50d0a097a42b6de283377da98ff757505120"
        },
        {
          "url": "https://git.kernel.org/stable/c/828f57ac75eaccd6607ee4d1468d34e983e32c68"
        },
        {
          "url": "https://git.kernel.org/stable/c/d957e7ffb2c72410bcc1a514153a46719255a5da"
        }
      ],
      "title": "scsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49986",
    "datePublished": "2025-06-18T11:00:47.985Z",
    "dateReserved": "2025-06-18T10:57:27.386Z",
    "dateUpdated": "2026-05-11T19:10:32.151Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49986",
      "date": "2026-05-26",
      "epss": "0.00049",
      "percentile": "0.15226"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49986\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:26.183\",\"lastModified\":\"2025-11-14T18:13:45.717\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nscsi: storvsc: Remove WQ_MEM_RECLAIM from storvsc_error_wq\\n\\nstorvsc_error_wq workqueue should not be marked as WQ_MEM_RECLAIM as it\\ndoesn\u0027t need to make forward progress under memory pressure.  Marking this\\nworkqueue as WQ_MEM_RECLAIM may cause deadlock while flushing a\\nnon-WQ_MEM_RECLAIM workqueue.  In the current state it causes the following\\nwarning:\\n\\n[   14.506347] ------------[ cut here ]------------\\n[   14.506354] workqueue: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun is flushing !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn\\n[   14.506360] WARNING: CPU: 0 PID: 8 at \u003c-snip-\u003ekernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130\\n[   14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.4.0-1086-azure #91~18.04.1-Ubuntu\\n[   14.506391] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 05/09/2022\\n[   14.506393] Workqueue: storvsc_error_wq_0 storvsc_remove_lun\\n[   14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130\\n\\t\\t\u003c-snip-\u003e\\n[   14.506408] Call Trace:\\n[   14.506412]  __flush_work+0xf1/0x1c0\\n[   14.506414]  __cancel_work_timer+0x12f/0x1b0\\n[   14.506417]  ? kernfs_put+0xf0/0x190\\n[   14.506418]  cancel_delayed_work_sync+0x13/0x20\\n[   14.506420]  disk_block_events+0x78/0x80\\n[   14.506421]  del_gendisk+0x3d/0x2f0\\n[   14.506423]  sr_remove+0x28/0x70\\n[   14.506427]  device_release_driver_internal+0xef/0x1c0\\n[   14.506428]  device_release_driver+0x12/0x20\\n[   14.506429]  bus_remove_device+0xe1/0x150\\n[   14.506431]  device_del+0x167/0x380\\n[   14.506432]  __scsi_remove_device+0x11d/0x150\\n[   14.506433]  scsi_remove_device+0x26/0x40\\n[   14.506434]  storvsc_remove_lun+0x40/0x60\\n[   14.506436]  process_one_work+0x209/0x400\\n[   14.506437]  worker_thread+0x34/0x400\\n[   14.506439]  kthread+0x121/0x140\\n[   14.506440]  ? process_one_work+0x400/0x400\\n[   14.506441]  ? kthread_park+0x90/0x90\\n[   14.506443]  ret_from_fork+0x35/0x40\\n[   14.506445] ---[ end trace 2d9633159fdc6ee7 ]---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: storvsc: Eliminar WQ_MEM_RECLAIM de storvsc_error_wq. La cola de trabajo storvsc_error_wq no debe marcarse como WQ_MEM_RECLAIM, ya que no necesita avanzar bajo presi\u00f3n de memoria. Marcar esta cola de trabajo como WQ_MEM_RECLAIM puede causar un bloqueo al vaciar una cola de trabajo que no sea WQ_MEM_RECLAIM. En el estado actual, provoca la siguiente advertencia: [ 14.506347] ------------[ cortar aqu\u00ed ]------------ [ 14.506354] cola de trabajo: WQ_MEM_RECLAIM storvsc_error_wq_0:storvsc_remove_lun se est\u00e1 vaciando !WQ_MEM_RECLAIM events_freezable_power_:disk_events_workfn [ 14.506360] ADVERTENCIA: CPU: 0 PID: 8 en \u0026lt;-snip-\u0026gt;kernel/workqueue.c:2623 check_flush_dependency+0xb5/0x130 [ 14.506390] CPU: 0 PID: 8 Comm: kworker/u4:0 No contaminado 5.4.0-1086-azure #91~18.04.1-Ubuntu [ 14.506391] Nombre del hardware: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI versi\u00f3n v4.1 09/05/2022 [ 14.506393] Cola de trabajo: storvsc_error_wq_0 storvsc_remove_lun [ 14.506395] RIP: 0010:check_flush_dependency+0xb5/0x130 \u0026lt;-snip-\u0026gt; [ 14.506408] Seguimiento de llamadas: [ 14.506412] __flush_work+0xf1/0x1c0 [ 14.506414] __cancel_work_timer+0x12f/0x1b0 [ 14.506417] ? kernfs_put+0xf0/0x190 [ 14.506418] cancel_delayed_work_sync+0x13/0x20 [ 14.506420] disk_block_events+0x78/0x80 [ 14.506421] del_gendisk+0x3d/0x2f0 [ 14.506423] sr_remove+0x28/0x70 [ 14.506427] device_release_driver_internal+0xef/0x1c0 [ 14.506428] device_release_driver+0x12/0x20 [ 14.506429] bus_remove_device+0xe1/0x150 [ 14.506431] device_del+0x167/0x380 [ 14.506432] __scsi_remove_device+0x11d/0x150 [ 14.506433] scsi_remove_device+0x26/0x40 [ 14.506434] storvsc_remove_lun+0x40/0x60 [ 14.506436] process_one_work+0x209/0x400 [ 14.506437] worker_thread+0x34/0x400 [ 14.506439] kthread+0x121/0x140 [ 14.506440] ? process_one_work+0x400/0x400 [ 14.506441] ? kthread_park+0x90/0x90 [ 14.506443] ret_from_fork+0x35/0x40 [ 14.506445] ---[ fin de seguimiento 2d9633159fdc6ee7 ]---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.257\",\"matchCriteriaId\":\"379F570B-8101-4252-AE1C-B802D441D9B4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.212\",\"matchCriteriaId\":\"BEFFBCD7-9B53-46AB-B3FD-53EAD80FD3E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.140\",\"matchCriteriaId\":\"A26216A8-920B-4892-A1EB-143451AFFC31\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.64\",\"matchCriteriaId\":\"292F3687-ADC2-4F3D-9710-3BCAD11A52BE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.19.6\",\"matchCriteriaId\":\"89E99903-E16D-475D-954B-2BAC46C98262\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E8BD11A3-8643-49B6-BADE-5029A0117325\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5F0AD220-F6A9-4012-8636-155F1B841FAD\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/46fcb0fc884db78a0384be92cc2a51927e6581b8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/828f57ac75eaccd6607ee4d1468d34e983e32c68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b4c928ace9a123629eeb14ec5d7ee8f73e5ac668\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b692c238ddfa61f00d97c4c1f021425d132ba96f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cd2a50d0a097a42b6de283377da98ff757505120\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d957e7ffb2c72410bcc1a514153a46719255a5da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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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.