CVE-2022-50092— dm thin: fix use-after-free crash in dm_sm_register_threshold_callback
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I. Basic Information for CVE-2022-50092
Vulnerability Information
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Vulnerability Title
dm thin: fix use-after-free crash in dm_sm_register_threshold_callback
Source: NVD (National Vulnerability Database)
Vulnerability Description
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: <TASK> 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".
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于dm_thin在dm_sm_register_threshold_callback中存在释放后重用问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2022-50092
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Same Patch Batch · Linux · 2025-06-18 · 362 CVEs total
| CVE-2022-50104 | powerpc/xive: Fix refcount leak in xive_get_max_prio | |
| CVE-2022-50116 | tty: n_gsm: fix deadlock and link starvation in outgoing data path | |
| CVE-2022-50114 | net: 9p: fix refcount leak in p9_read_work() error handling | |
| CVE-2022-50113 | ASoc: audio-graph-card2: Fix refcount leak bug in __graph_get_type() | |
| CVE-2022-50112 | rpmsg: qcom_smd: Fix refcount leak in qcom_smd_parse_edge | |
| CVE-2022-50111 | ASoC: mt6359: Fix refcount leak bug | |
| CVE-2022-50110 | watchdog: sp5100_tco: Fix a memory leak of EFCH MMIO resource | |
| CVE-2022-50109 | video: fbdev: amba-clcd: Fix refcount leak bugs | |
| CVE-2022-50108 | mfd: max77620: Fix refcount leak in max77620_initialise_fps | |
| CVE-2022-50106 | powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address | |
| CVE-2022-50107 | cifs: Fix memory leak when using fscache | |
| CVE-2022-50105 | powerpc/spufs: Fix refcount leak in spufs_init_isolated_loader | |
| CVE-2022-50099 | video: fbdev: arkfb: Check the size of screen before memset_io() | |
| CVE-2022-50095 | posix-cpu-timers: Cleanup CPU timers before freeing them during exec | |
| CVE-2022-50094 | spmi: trace: fix stack-out-of-bound access in SPMI tracing functions | |
| CVE-2022-50096 | x86/kprobes: Update kcb status flag after singlestepping | |
| CVE-2022-50097 | video: fbdev: s3fb: Check the size of screen before memset_io() | |
| CVE-2022-50098 | scsi: qla2xxx: Fix crash due to stale SRB access around I/O timeouts | |
| CVE-2022-50101 | video: fbdev: vt8623fb: Check the size of screen before memset_io() | |
| CVE-2022-50103 | sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed |
Showing top 20 of 362 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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