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CVE-2022-50549— Linux kernel 安全漏洞

AI 预测 5.5 利用难度: 中等 EPSS 0.14% · P4

影响版本矩阵 14

厂商产品版本范围状态
LinuxLinuxe49e582965b3694f07a106adc83ddb44aa4f0890< 200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8faffected
e49e582965b3694f07a106adc83ddb44aa4f0890< 7e37578069737b04955c71dd85db8a3bc2709effaffected
e49e582965b3694f07a106adc83ddb44aa4f0890< f8c26c33fef588ee54852cffa7cbb9f9d9869405affected
e49e582965b3694f07a106adc83ddb44aa4f0890< 2d891cc5a1706b6908bceb56af7176a463ee6d62affected
e49e582965b3694f07a106adc83ddb44aa4f0890< cdf7a39bcc427febbfe3c3b9fe829825ead96c27affected
e49e582965b3694f07a106adc83ddb44aa4f0890< 8111964f1b8524c4bb56b02cd9c7a37725ea21fdaffected
3.6affected
< 3.6unaffected
… +6 条更多
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一、 漏洞 CVE-2022-50549 基础信息

漏洞信息
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Vulnerability Title
dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata Following concurrent processes: P1(drop cache) P2(kworker) drop_caches_sysctl_handler drop_slab shrink_slab down_read(&shrinker_rwsem) - LOCK A do_shrink_slab super_cache_scan prune_icache_sb dispose_list evict ext4_evict_inode ext4_clear_inode ext4_discard_preallocations ext4_mb_load_buddy_gfp ext4_mb_init_cache ext4_read_block_bitmap_nowait ext4_read_bh_nowait submit_bh dm_submit_bio do_worker process_deferred_bios commit metadata_operation_failed dm_pool_abort_metadata down_write(&pmd->root_lock) - LOCK B __destroy_persistent_data_objects dm_block_manager_destroy dm_bufio_client_destroy unregister_shrinker down_write(&shrinker_rwsem) thin_map | dm_thin_find_block ↓ down_read(&pmd->root_lock) --> ABBA deadlock , which triggers hung task: [ 76.974820] INFO: task kworker/u4:3:63 blocked for more than 15 seconds. [ 76.976019] Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910 [ 76.978521] task:kworker/u4:3 state:D stack:0 pid:63 ppid:2 [ 76.978534] Workqueue: dm-thin do_worker [ 76.978552] Call Trace: [ 76.978564] __schedule+0x6ba/0x10f0 [ 76.978582] schedule+0x9d/0x1e0 [ 76.978588] rwsem_down_write_slowpath+0x587/0xdf0 [ 76.978600] down_write+0xec/0x110 [ 76.978607] unregister_shrinker+0x2c/0xf0 [ 76.978616] dm_bufio_client_destroy+0x116/0x3d0 [ 76.978625] dm_block_manager_destroy+0x19/0x40 [ 76.978629] __destroy_persistent_data_objects+0x5e/0x70 [ 76.978636] dm_pool_abort_metadata+0x8e/0x100 [ 76.978643] metadata_operation_failed+0x86/0x110 [ 76.978649] commit+0x6a/0x230 [ 76.978655] do_worker+0xc6e/0xd90 [ 76.978702] process_one_work+0x269/0x630 [ 76.978714] worker_thread+0x266/0x630 [ 76.978730] kthread+0x151/0x1b0 [ 76.978772] INFO: task test.sh:2646 blocked for more than 15 seconds. [ 76.979756] Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910 [ 76.982111] task:test.sh state:D stack:0 pid:2646 ppid:2459 [ 76.982128] Call Trace: [ 76.982139] __schedule+0x6ba/0x10f0 [ 76.982155] schedule+0x9d/0x1e0 [ 76.982159] rwsem_down_read_slowpath+0x4f4/0x910 [ 76.982173] down_read+0x84/0x170 [ 76.982177] dm_thin_find_block+0x4c/0xd0 [ 76.982183] thin_map+0x201/0x3d0 [ 76.982188] __map_bio+0x5b/0x350 [ 76.982195] dm_submit_bio+0x2b6/0x930 [ 76.982202] __submit_bio+0x123/0x2d0 [ 76.982209] submit_bio_noacct_nocheck+0x101/0x3e0 [ 76.982222] submit_bio_noacct+0x389/0x770 [ 76.982227] submit_bio+0x50/0xc0 [ 76.982232] submit_bh_wbc+0x15e/0x230 [ 76.982238] submit_bh+0x14/0x20 [ 76.982241] ext4_read_bh_nowait+0xc5/0x130 [ 76.982247] ext4_read_block_bitmap_nowait+0x340/0xc60 [ 76.982254] ext4_mb_init_cache+0x1ce/0xdc0 [ 76.982259] ext4_mb_load_buddy_gfp+0x987/0xfa0 [ 76.982263] ext4_discard_preallocations+0x45d/0x830 [ 76.982274] ext4_clear_inode+0x48/0xf0 [ 76.982280] ext4_evict_inode+0xcf/0xc70 [ 76.982285] evict+0x119/0x2b0 [ 76.982290] dispose_list+0x43/0xa0 [ 76.982294] prune_icache_sb+0x64/0x90 [ 76.982298] super_cache_scan+0x155/0x210 [ 76.982303] do_shrink_slab+0x19e/0x4e0 [ 76.982310] shrink_slab+0x2bd/0x450 [ 76.982317] drop_slab+0xcc/0x1a0 [ 76.982323] drop_caches_sysctl_handler+0xb7/0xe0 [ 76.982327] proc_sys_call_handler+0x1bc/0x300 [ 76.982331] proc_sys_write+0x17/0x20 [ 76.982334] vfs_write+0x3d3/0x570 [ 76.982342] ksys_write+0x73/0x160 [ 76.982347] __x64_sys_write+0x1e/0x30 [ 76.982352] do_syscall_64+0x35/0x80 [ 76.982357] entry_SYSCALL_64_after_hwframe+0x63/0xcd Funct ---truncated---
来源: 美国国家漏洞数据库 NVD
CVSS Information
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
N/A
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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shrinker_rwsem和dm_pool_abort_metadata之间的ABBA死锁，可能导致系统挂起。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商产品影响版本CPE订阅
LinuxLinux e49e582965b3694f07a106adc83ddb44aa4f0890 ~ 200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f -
LinuxLinux 3.6 -

二、漏洞 CVE-2022-50549 的公开POC

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三、漏洞 CVE-2022-50549 的情报信息

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CVE-2022-50549 补丁与修复 (6)

同批安全公告 · Linux · 2025-10-07 · 共 118 条

CVE-2022-50545Linux kernel 安全漏洞
CVE-2023-53658Linux kernel 安全漏洞
CVE-2023-53657Linux kernel 安全漏洞
CVE-2023-53656Linux kernel 安全漏洞
CVE-2023-53655Linux kernel 安全漏洞
CVE-2022-50555Linux kernel 安全漏洞
CVE-2022-50554Linux kernel 安全漏洞
CVE-2022-50553Linux kernel 安全漏洞
CVE-2022-50552Linux kernel 安全漏洞
CVE-2022-50551Linux kernel 安全漏洞
CVE-2022-50550Linux kernel 安全漏洞
CVE-2022-50547Linux kernel 安全漏洞
CVE-2022-50548Linux kernel 安全漏洞
CVE-2022-50546Linux kernel 安全漏洞
CVE-2022-50544Linux kernel 安全漏洞
CVE-2023-53653Linux kernel 安全漏洞
CVE-2022-50536Linux kernel 安全漏洞
CVE-2022-50535Linux kernel 安全漏洞
CVE-2023-53654Linux kernel 安全漏洞
CVE-2023-53651Linux kernel 安全漏洞

显示前 20 条，共 118 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50549

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