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CVE-2022-50549 (GCVE-0-2022-50549)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2026-05-11 19:21
VLAI
Title
dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata
Summary
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---
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < 200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f (git)
Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < 7e37578069737b04955c71dd85db8a3bc2709eff (git)
Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < f8c26c33fef588ee54852cffa7cbb9f9d9869405 (git)
Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < 2d891cc5a1706b6908bceb56af7176a463ee6d62 (git)
Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < cdf7a39bcc427febbfe3c3b9fe829825ead96c27 (git)
Affected: e49e582965b3694f07a106adc83ddb44aa4f0890 , < 8111964f1b8524c4bb56b02cd9c7a37725ea21fd (git)
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Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.87 , ≤ 5.15.* (semver)
Unaffected: 6.0.18 , ≤ 6.0.* (semver)
Unaffected: 6.1.4 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-thin-metadata.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            },
            {
              "lessThan": "7e37578069737b04955c71dd85db8a3bc2709eff",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            },
            {
              "lessThan": "f8c26c33fef588ee54852cffa7cbb9f9d9869405",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            },
            {
              "lessThan": "2d891cc5a1706b6908bceb56af7176a463ee6d62",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            },
            {
              "lessThan": "cdf7a39bcc427febbfe3c3b9fe829825ead96c27",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            },
            {
              "lessThan": "8111964f1b8524c4bb56b02cd9c7a37725ea21fd",
              "status": "affected",
              "version": "e49e582965b3694f07a106adc83ddb44aa4f0890",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-thin-metadata.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.6"
            },
            {
              "lessThan": "3.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.87",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.229",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.163",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.87",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.18",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.4",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "3.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata\n\nFollowing concurrent processes:\n\n          P1(drop cache)                P2(kworker)\ndrop_caches_sysctl_handler\n drop_slab\n  shrink_slab\n   down_read(\u0026shrinker_rwsem)  - LOCK A\n   do_shrink_slab\n    super_cache_scan\n     prune_icache_sb\n      dispose_list\n       evict\n        ext4_evict_inode\n\t ext4_clear_inode\n\t  ext4_discard_preallocations\n\t   ext4_mb_load_buddy_gfp\n\t    ext4_mb_init_cache\n\t     ext4_read_block_bitmap_nowait\n\t      ext4_read_bh_nowait\n\t       submit_bh\n\t        dm_submit_bio\n\t\t                 do_worker\n\t\t\t\t  process_deferred_bios\n\t\t\t\t   commit\n\t\t\t\t    metadata_operation_failed\n\t\t\t\t     dm_pool_abort_metadata\n\t\t\t\t      down_write(\u0026pmd-\u003eroot_lock) - LOCK B\n\t\t                      __destroy_persistent_data_objects\n\t\t\t\t       dm_block_manager_destroy\n\t\t\t\t        dm_bufio_client_destroy\n\t\t\t\t         unregister_shrinker\n\t\t\t\t\t  down_write(\u0026shrinker_rwsem)\n\t\t thin_map                            |\n\t\t  dm_thin_find_block                 \u2193\n\t\t   down_read(\u0026pmd-\u003eroot_lock) --\u003e ABBA deadlock\n\n, which triggers hung task:\n\n[   76.974820] INFO: task kworker/u4:3:63 blocked for more than 15 seconds.\n[   76.976019]       Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910\n[   76.978521] task:kworker/u4:3    state:D stack:0     pid:63    ppid:2\n[   76.978534] Workqueue: dm-thin do_worker\n[   76.978552] Call Trace:\n[   76.978564]  __schedule+0x6ba/0x10f0\n[   76.978582]  schedule+0x9d/0x1e0\n[   76.978588]  rwsem_down_write_slowpath+0x587/0xdf0\n[   76.978600]  down_write+0xec/0x110\n[   76.978607]  unregister_shrinker+0x2c/0xf0\n[   76.978616]  dm_bufio_client_destroy+0x116/0x3d0\n[   76.978625]  dm_block_manager_destroy+0x19/0x40\n[   76.978629]  __destroy_persistent_data_objects+0x5e/0x70\n[   76.978636]  dm_pool_abort_metadata+0x8e/0x100\n[   76.978643]  metadata_operation_failed+0x86/0x110\n[   76.978649]  commit+0x6a/0x230\n[   76.978655]  do_worker+0xc6e/0xd90\n[   76.978702]  process_one_work+0x269/0x630\n[   76.978714]  worker_thread+0x266/0x630\n[   76.978730]  kthread+0x151/0x1b0\n[   76.978772] INFO: task test.sh:2646 blocked for more than 15 seconds.\n[   76.979756]       Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910\n[   76.982111] task:test.sh         state:D stack:0     pid:2646  ppid:2459\n[   76.982128] Call Trace:\n[   76.982139]  __schedule+0x6ba/0x10f0\n[   76.982155]  schedule+0x9d/0x1e0\n[   76.982159]  rwsem_down_read_slowpath+0x4f4/0x910\n[   76.982173]  down_read+0x84/0x170\n[   76.982177]  dm_thin_find_block+0x4c/0xd0\n[   76.982183]  thin_map+0x201/0x3d0\n[   76.982188]  __map_bio+0x5b/0x350\n[   76.982195]  dm_submit_bio+0x2b6/0x930\n[   76.982202]  __submit_bio+0x123/0x2d0\n[   76.982209]  submit_bio_noacct_nocheck+0x101/0x3e0\n[   76.982222]  submit_bio_noacct+0x389/0x770\n[   76.982227]  submit_bio+0x50/0xc0\n[   76.982232]  submit_bh_wbc+0x15e/0x230\n[   76.982238]  submit_bh+0x14/0x20\n[   76.982241]  ext4_read_bh_nowait+0xc5/0x130\n[   76.982247]  ext4_read_block_bitmap_nowait+0x340/0xc60\n[   76.982254]  ext4_mb_init_cache+0x1ce/0xdc0\n[   76.982259]  ext4_mb_load_buddy_gfp+0x987/0xfa0\n[   76.982263]  ext4_discard_preallocations+0x45d/0x830\n[   76.982274]  ext4_clear_inode+0x48/0xf0\n[   76.982280]  ext4_evict_inode+0xcf/0xc70\n[   76.982285]  evict+0x119/0x2b0\n[   76.982290]  dispose_list+0x43/0xa0\n[   76.982294]  prune_icache_sb+0x64/0x90\n[   76.982298]  super_cache_scan+0x155/0x210\n[   76.982303]  do_shrink_slab+0x19e/0x4e0\n[   76.982310]  shrink_slab+0x2bd/0x450\n[   76.982317]  drop_slab+0xcc/0x1a0\n[   76.982323]  drop_caches_sysctl_handler+0xb7/0xe0\n[   76.982327]  proc_sys_call_handler+0x1bc/0x300\n[   76.982331]  proc_sys_write+0x17/0x20\n[   76.982334]  vfs_write+0x3d3/0x570\n[   76.982342]  ksys_write+0x73/0x160\n[   76.982347]  __x64_sys_write+0x1e/0x30\n[   76.982352]  do_syscall_64+0x35/0x80\n[   76.982357]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFunct\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:21:34.417Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e37578069737b04955c71dd85db8a3bc2709eff"
        },
        {
          "url": "https://git.kernel.org/stable/c/f8c26c33fef588ee54852cffa7cbb9f9d9869405"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d891cc5a1706b6908bceb56af7176a463ee6d62"
        },
        {
          "url": "https://git.kernel.org/stable/c/cdf7a39bcc427febbfe3c3b9fe829825ead96c27"
        },
        {
          "url": "https://git.kernel.org/stable/c/8111964f1b8524c4bb56b02cd9c7a37725ea21fd"
        }
      ],
      "title": "dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50549",
    "datePublished": "2025-10-07T15:21:12.006Z",
    "dateReserved": "2025-10-07T15:15:38.668Z",
    "dateUpdated": "2026-05-11T19:21:34.417Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-50549",
      "date": "2026-09-16",
      "epss": "0.0015",
      "percentile": "0.04575"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50549\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-07T16:15:39.897\",\"lastModified\":\"2026-06-17T05:23:46.303\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata\\n\\nFollowing concurrent processes:\\n\\n          P1(drop cache)                P2(kworker)\\ndrop_caches_sysctl_handler\\n drop_slab\\n  shrink_slab\\n   down_read(\u0026shrinker_rwsem)  - LOCK A\\n   do_shrink_slab\\n    super_cache_scan\\n     prune_icache_sb\\n      dispose_list\\n       evict\\n        ext4_evict_inode\\n\\t ext4_clear_inode\\n\\t  ext4_discard_preallocations\\n\\t   ext4_mb_load_buddy_gfp\\n\\t    ext4_mb_init_cache\\n\\t     ext4_read_block_bitmap_nowait\\n\\t      ext4_read_bh_nowait\\n\\t       submit_bh\\n\\t        dm_submit_bio\\n\\t\\t                 do_worker\\n\\t\\t\\t\\t  process_deferred_bios\\n\\t\\t\\t\\t   commit\\n\\t\\t\\t\\t    metadata_operation_failed\\n\\t\\t\\t\\t     dm_pool_abort_metadata\\n\\t\\t\\t\\t      down_write(\u0026pmd-\u003eroot_lock) - LOCK B\\n\\t\\t                      __destroy_persistent_data_objects\\n\\t\\t\\t\\t       dm_block_manager_destroy\\n\\t\\t\\t\\t        dm_bufio_client_destroy\\n\\t\\t\\t\\t         unregister_shrinker\\n\\t\\t\\t\\t\\t  down_write(\u0026shrinker_rwsem)\\n\\t\\t thin_map                            |\\n\\t\\t  dm_thin_find_block                 \u2193\\n\\t\\t   down_read(\u0026pmd-\u003eroot_lock) --\u003e ABBA deadlock\\n\\n, which triggers hung task:\\n\\n[   76.974820] INFO: task kworker/u4:3:63 blocked for more than 15 seconds.\\n[   76.976019]       Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910\\n[   76.978521] task:kworker/u4:3    state:D stack:0     pid:63    ppid:2\\n[   76.978534] Workqueue: dm-thin do_worker\\n[   76.978552] Call Trace:\\n[   76.978564]  __schedule+0x6ba/0x10f0\\n[   76.978582]  schedule+0x9d/0x1e0\\n[   76.978588]  rwsem_down_write_slowpath+0x587/0xdf0\\n[   76.978600]  down_write+0xec/0x110\\n[   76.978607]  unregister_shrinker+0x2c/0xf0\\n[   76.978616]  dm_bufio_client_destroy+0x116/0x3d0\\n[   76.978625]  dm_block_manager_destroy+0x19/0x40\\n[   76.978629]  __destroy_persistent_data_objects+0x5e/0x70\\n[   76.978636]  dm_pool_abort_metadata+0x8e/0x100\\n[   76.978643]  metadata_operation_failed+0x86/0x110\\n[   76.978649]  commit+0x6a/0x230\\n[   76.978655]  do_worker+0xc6e/0xd90\\n[   76.978702]  process_one_work+0x269/0x630\\n[   76.978714]  worker_thread+0x266/0x630\\n[   76.978730]  kthread+0x151/0x1b0\\n[   76.978772] INFO: task test.sh:2646 blocked for more than 15 seconds.\\n[   76.979756]       Not tainted 6.1.0-rc4-00011-g8f17dd350364-dirty #910\\n[   76.982111] task:test.sh         state:D stack:0     pid:2646  ppid:2459\\n[   76.982128] Call Trace:\\n[   76.982139]  __schedule+0x6ba/0x10f0\\n[   76.982155]  schedule+0x9d/0x1e0\\n[   76.982159]  rwsem_down_read_slowpath+0x4f4/0x910\\n[   76.982173]  down_read+0x84/0x170\\n[   76.982177]  dm_thin_find_block+0x4c/0xd0\\n[   76.982183]  thin_map+0x201/0x3d0\\n[   76.982188]  __map_bio+0x5b/0x350\\n[   76.982195]  dm_submit_bio+0x2b6/0x930\\n[   76.982202]  __submit_bio+0x123/0x2d0\\n[   76.982209]  submit_bio_noacct_nocheck+0x101/0x3e0\\n[   76.982222]  submit_bio_noacct+0x389/0x770\\n[   76.982227]  submit_bio+0x50/0xc0\\n[   76.982232]  submit_bh_wbc+0x15e/0x230\\n[   76.982238]  submit_bh+0x14/0x20\\n[   76.982241]  ext4_read_bh_nowait+0xc5/0x130\\n[   76.982247]  ext4_read_block_bitmap_nowait+0x340/0xc60\\n[   76.982254]  ext4_mb_init_cache+0x1ce/0xdc0\\n[   76.982259]  ext4_mb_load_buddy_gfp+0x987/0xfa0\\n[   76.982263]  ext4_discard_preallocations+0x45d/0x830\\n[   76.982274]  ext4_clear_inode+0x48/0xf0\\n[   76.982280]  ext4_evict_inode+0xcf/0xc70\\n[   76.982285]  evict+0x119/0x2b0\\n[   76.982290]  dispose_list+0x43/0xa0\\n[   76.982294]  prune_icache_sb+0x64/0x90\\n[   76.982298]  super_cache_scan+0x155/0x210\\n[   76.982303]  do_shrink_slab+0x19e/0x4e0\\n[   76.982310]  shrink_slab+0x2bd/0x450\\n[   76.982317]  drop_slab+0xcc/0x1a0\\n[   76.982323]  drop_caches_sysctl_handler+0xb7/0xe0\\n[   76.982327]  proc_sys_call_handler+0x1bc/0x300\\n[   76.982331]  proc_sys_write+0x17/0x20\\n[   76.982334]  vfs_write+0x3d3/0x570\\n[   76.982342]  ksys_write+0x73/0x160\\n[   76.982347]  __x64_sys_write+0x1e/0x30\\n[   76.982352]  do_syscall_64+0x35/0x80\\n[   76.982357]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nFunct\\n---truncated---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/md/dm-thin-metadata.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"7e37578069737b04955c71dd85db8a3bc2709eff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"f8c26c33fef588ee54852cffa7cbb9f9d9869405\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"2d891cc5a1706b6908bceb56af7176a463ee6d62\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"cdf7a39bcc427febbfe3c3b9fe829825ead96c27\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e49e582965b3694f07a106adc83ddb44aa4f0890\",\"lessThan\":\"8111964f1b8524c4bb56b02cd9c7a37725ea21fd\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/md/dm-thin-metadata.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.6\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.6\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.87\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.18\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.4\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-667\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.6\",\"versionEndExcluding\":\"5.4.229\",\"matchCriteriaId\":\"0EE55E32-079C-4462-8EC8-3133A29D588B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.163\",\"matchCriteriaId\":\"D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.87\",\"matchCriteriaId\":\"7B9E5B1C-CD46-4790-9500-615863850401\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.18\",\"matchCriteriaId\":\"08D38C5F-9644-4549-BBA6-F0860F024D14\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.4\",\"matchCriteriaId\":\"BC4189D9-5478-4E88-A78D-9C1DE29B217C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/200aa33b5d781e7c0fa6c0c7db9dbcc3f574ce8f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2d891cc5a1706b6908bceb56af7176a463ee6d62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/7e37578069737b04955c71dd85db8a3bc2709eff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8111964f1b8524c4bb56b02cd9c7a37725ea21fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cdf7a39bcc427febbfe3c3b9fe829825ead96c27\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f8c26c33fef588ee54852cffa7cbb9f9d9869405\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-30T10:37:03+00:00",
      "cve": "CVE-2022-50549",
      "id": "CVE-2022-50549",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "321",
      "product_status:known_affected": "80",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50549.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:26:34Z",
      "cve": "CVE-2022-50549",
      "id": "CVE-2022-50549",
      "initial_release_date": "2025-10-25T00:14:58Z",
      "product_status:known_affected": "507",
      "product_status:known_not_affected": "172",
      "product_status:recommended": "343",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50549",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50549.json",
      "version": "43"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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