cbcvebase.
CVE-2022-50092
published 2025-06-18

CVE-2022-50092: In the Linux kernel, the following vulnerability has been resolved: dm thin: fix use-after-free crash in dm_sm_register_threshold_callback Fault inject on pool…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.20%
10.6th percentile
In the Linux kernel, the following vulnerability has been resolved: dm thin: fix use-after-free crash in dm_sm_register_threshold_callback Fault inject on pool metadata device reports: BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80 Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950 CPU: 7 PID: 950 Comm: dmsetup Tainted: G W 5.19.0-rc6 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: dump_stack_lvl+0x34/0x44 print_address_description.constprop.0.cold+0xeb/0x3f4 kasan_report.cold+0xe6/0x147 dm_pool_register_metadata_threshold+0x40/0x80 pool_ctr+0xa0a/0x1150 dm_table_add_target+0x2c8/0x640 table_load+0x1fd/0x430 ctl_ioctl+0x2c4/0x5a0 dm_ctl_ioctl+0xa/0x10 __x64_sys_ioctl+0xb3/0xd0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 This can be easily reproduced using: echo offline > /sys/block/sda/device/state dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10 dmsetup load pool --table "0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0" If a metadata commit fails, the transaction will be aborted and the metadata space maps will be destroyed. If a DM table reload then happens for this failed thin-pool, a use-after-free will occur in dm_sm_register_threshold_callback (called from dm_pool_register_metadata_threshold). Fix this by in dm_pool_register_metadata_threshold() by returning the -EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr() with a new error message: "Error registering metadata threshold".

Affected

17 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.0.2-1 (bookworm)linux 6.0.2-1 (bookworm)
linuxlinux——
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < 05cef0999b3208b5a6ede1bfac855139e4de55ef05cef0999b3208b5a6ede1bfac855139e4de55ef
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < 5e2cf705155a1514be3c96ea664a9cd356998ee75e2cf705155a1514be3c96ea664a9cd356998ee7
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < f83131a3071a0b61a4d7dca70f95adb3ffad920ef83131a3071a0b61a4d7dca70f95adb3ffad920e
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < 1a199fa9217d28511ff88529238fd9980ea64cf31a199fa9217d28511ff88529238fd9980ea64cf3
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790
linuxlinux>= ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e < 3534e5a5ed2997ca1b00f44a0378a075bd05e8a33534e5a5ed2997ca1b00f44a0378a075bd05e8a3
linuxlinux_kernel>= 0 < 5.10.140-15.10.140-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 0 < 6.0.2-16.0.2-1
linuxlinux_kernel>= 3.10 < 5.4.2115.4.211
linuxlinux_kernel>= 5.11 < 5.15.615.15.61
linuxlinux_kernel>= 5.16 < 5.18.185.18.18
linuxlinux_kernel>= 5.19 < 5.19.25.19.2
linuxlinux_kernel>= 5.5 < 5.10.1375.10.137

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.