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CVE-2022-49986

Vulnérabilité non évaluée dans Linux (Linux)

CVSS 0.0 · Non évaluée
EPSS 0.2%
Linux•Linux•Versions : <46fcb0fc884db78a0384be92cc2a51927e6581b8, 436ad941335386c5fc7faa915a8fbdfe8c908084, 0, 4.19.257, 5.15.64, 5.10.140, <=5.10.*, 6.0, <b4c928ace9a123629eeb14ec5d7ee8f73e5ac668, <=5.4.*, <=4.19.*, 5.4.212, <b692c238ddfa61f00d97c4c1f021425d132ba96f, 5.19.6, <cd2a50d0a097a42b6de283377da98ff757505120, <828f57ac75eaccd6607ee4d1468d34e983e32c68, <=*, <=5.15.*, <d957e7ffb2c72410bcc1a514153a46719255a5da, <=5.19.*, <4.15, 4.15

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 ]---

Gravité et risque d'exploitation

CVE-2022-49986 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.19 %, ce qui la place devant 7.8 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <46fcb0fc884db78a0384be92cc2a51927e6581b8, 436ad941335386c5fc7faa915a8fbdfe8c908084, 0, 4.19.257, 5.15.64, 5.10.140, <=5.10.*, 6.0, <b4c928ace9a123629eeb14ec5d7ee8f73e5ac668, <=5.4.*, <=4.19.*, 5.4.212, <b692c238ddfa61f00d97c4c1f021425d132ba96f, 5.19.6, <cd2a50d0a097a42b6de283377da98ff757505120, <828f57ac75eaccd6607ee4d1468d34e983e32c68, <=*, <=5.15.*, <d957e7ffb2c72410bcc1a514153a46719255a5da, <=5.19.*, <4.15, 4.15) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

Rechercher une autre CVE