CVE-2022-49986

MEDIUM EPSS 5.1%
Published Jun 18, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jun 18, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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 ]---

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel*≥4.15  –  <4.19.257
linuxlinux_kernel*≥4.20  –  <5.4.212
linuxlinux_kernel*≥5.5  –  <5.10.140
linuxlinux_kernel*≥5.11  –  <5.15.64
linuxlinux_kernel*≥5.16  –  <5.19.6
linuxlinux_kernel6.0any
linuxlinux_kernel6.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/46fcb0fc884db78a0384be92cc2a51927e6581b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/828f57ac75eaccd6607ee4d1468d34e983e32c68
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4c928ace9a123629eeb14ec5d7ee8f73e5ac668
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b692c238ddfa61f00d97c4c1f021425d132ba96f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd2a50d0a097a42b6de283377da98ff757505120
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d957e7ffb2c72410bcc1a514153a46719255a5da
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/46fcb0fc884db78a0384be92cc2a51927e6581b8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/828f57ac75eaccd6607ee4d1468d34e983e32c68
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4c928ace9a123629eeb14ec5d7ee8f73e5ac668
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b692c238ddfa61f00d97c4c1f021425d132ba96f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cd2a50d0a097a42b6de283377da98ff757505120
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d957e7ffb2c72410bcc1a514153a46719255a5da
    Patch