CVE-2021-47379 (GCVE-0-2021-47379)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2025-05-21 08:31
VLAI?
Title
blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
Summary
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd KASAN reports a use-after-free report when doing fuzz test: [693354.104835] ================================================================== [693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160 [693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338 [693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147 [693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018 [693354.105612] Call Trace: [693354.105621] dump_stack+0xf1/0x19b [693354.105626] ? show_regs_print_info+0x5/0x5 [693354.105634] ? printk+0x9c/0xc3 [693354.105638] ? cpumask_weight+0x1f/0x1f [693354.105648] print_address_description+0x70/0x360 [693354.105654] kasan_report+0x1b2/0x330 [693354.105659] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105665] ? bfq_io_set_weight_legacy+0xd3/0x160 [693354.105670] bfq_io_set_weight_legacy+0xd3/0x160 [693354.105675] ? bfq_cpd_init+0x20/0x20 [693354.105683] cgroup_file_write+0x3aa/0x510 [693354.105693] ? ___slab_alloc+0x507/0x540 [693354.105698] ? cgroup_file_poll+0x60/0x60 [693354.105702] ? 0xffffffff89600000 [693354.105708] ? usercopy_abort+0x90/0x90 [693354.105716] ? mutex_lock+0xef/0x180 [693354.105726] kernfs_fop_write+0x1ab/0x280 [693354.105732] ? cgroup_file_poll+0x60/0x60 [693354.105738] vfs_write+0xe7/0x230 [693354.105744] ksys_write+0xb0/0x140 [693354.105749] ? __ia32_sys_read+0x50/0x50 [693354.105760] do_syscall_64+0x112/0x370 [693354.105766] ? syscall_return_slowpath+0x260/0x260 [693354.105772] ? do_page_fault+0x9b/0x270 [693354.105779] ? prepare_exit_to_usermode+0xf9/0x1a0 [693354.105784] ? enter_from_user_mode+0x30/0x30 [693354.105793] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.105875] Allocated by task 1453337: [693354.106001] kasan_kmalloc+0xa0/0xd0 [693354.106006] kmem_cache_alloc_node_trace+0x108/0x220 [693354.106010] bfq_pd_alloc+0x96/0x120 [693354.106015] blkcg_activate_policy+0x1b7/0x2b0 [693354.106020] bfq_create_group_hierarchy+0x1e/0x80 [693354.106026] bfq_init_queue+0x678/0x8c0 [693354.106031] blk_mq_init_sched+0x1f8/0x460 [693354.106037] elevator_switch_mq+0xe1/0x240 [693354.106041] elevator_switch+0x25/0x40 [693354.106045] elv_iosched_store+0x1a1/0x230 [693354.106049] queue_attr_store+0x78/0xb0 [693354.106053] kernfs_fop_write+0x1ab/0x280 [693354.106056] vfs_write+0xe7/0x230 [693354.106060] ksys_write+0xb0/0x140 [693354.106064] do_syscall_64+0x112/0x370 [693354.106069] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106114] Freed by task 1453336: [693354.106225] __kasan_slab_free+0x130/0x180 [693354.106229] kfree+0x90/0x1b0 [693354.106233] blkcg_deactivate_policy+0x12c/0x220 [693354.106238] bfq_exit_queue+0xf5/0x110 [693354.106241] blk_mq_exit_sched+0x104/0x130 [693354.106245] __elevator_exit+0x45/0x60 [693354.106249] elevator_switch_mq+0xd6/0x240 [693354.106253] elevator_switch+0x25/0x40 [693354.106257] elv_iosched_store+0x1a1/0x230 [693354.106261] queue_attr_store+0x78/0xb0 [693354.106264] kernfs_fop_write+0x1ab/0x280 [693354.106268] vfs_write+0xe7/0x230 [693354.106271] ksys_write+0xb0/0x140 [693354.106275] do_syscall_64+0x112/0x370 [693354.106280] entry_SYSCALL_64_after_hwframe+0x65/0xca [693354.106329] The buggy address belongs to the object at ffff888be0a35580 which belongs to the cache kmalloc-1k of size 1024 [693354.106736] The buggy address is located 228 bytes inside of 1024-byte region [ffff888be0a35580, ffff888be0a35980) [693354.107114] The buggy address belongs to the page: [693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0 [693354.107606] flags: 0x17ffffc0008100(slab|head) [693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080 [693354.108020] r ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 946b81da114b8ba5c74bb01e57c0c6eca2bdc801 , < d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08 (git)
Affected: 946b81da114b8ba5c74bb01e57c0c6eca2bdc801 , < f58d305887ad7b24986d58e881f6806bb81b2bdf (git)
Affected: 946b81da114b8ba5c74bb01e57c0c6eca2bdc801 , < 7c2c69e010431b0157c9454adcdd2305809bf9fb (git)
Affected: 946b81da114b8ba5c74bb01e57c0c6eca2bdc801 , < 858560b27645e7e97aca37ee8f232cccd658fbd2 (git)
Affected: 9d5e2d69705fed4ab527f5a283b90ae602f4e0fd (git)
Affected: 3ca6e949b751fa3dfbf475ce635364cef543738b (git)
Create a notification for this product.
    Linux Linux Affected: 4.17
Unaffected: 0 , < 4.17 (semver)
Unaffected: 5.4.150 , ≤ 5.4.* (semver)
Unaffected: 5.10.70 , ≤ 5.10.* (semver)
Unaffected: 5.14.9 , ≤ 5.14.* (semver)
Unaffected: 5.15 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd\n\nKASAN reports a use-after-free report when doing fuzz test:\n\n[693354.104835] ==================================================================\n[693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338\n\n[693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147\n[693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018\n[693354.105612] Call Trace:\n[693354.105621]  dump_stack+0xf1/0x19b\n[693354.105626]  ? show_regs_print_info+0x5/0x5\n[693354.105634]  ? printk+0x9c/0xc3\n[693354.105638]  ? cpumask_weight+0x1f/0x1f\n[693354.105648]  print_address_description+0x70/0x360\n[693354.105654]  kasan_report+0x1b2/0x330\n[693354.105659]  ? bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105665]  ? bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105670]  bfq_io_set_weight_legacy+0xd3/0x160\n[693354.105675]  ? bfq_cpd_init+0x20/0x20\n[693354.105683]  cgroup_file_write+0x3aa/0x510\n[693354.105693]  ? ___slab_alloc+0x507/0x540\n[693354.105698]  ? cgroup_file_poll+0x60/0x60\n[693354.105702]  ? 0xffffffff89600000\n[693354.105708]  ? usercopy_abort+0x90/0x90\n[693354.105716]  ? mutex_lock+0xef/0x180\n[693354.105726]  kernfs_fop_write+0x1ab/0x280\n[693354.105732]  ? cgroup_file_poll+0x60/0x60\n[693354.105738]  vfs_write+0xe7/0x230\n[693354.105744]  ksys_write+0xb0/0x140\n[693354.105749]  ? __ia32_sys_read+0x50/0x50\n[693354.105760]  do_syscall_64+0x112/0x370\n[693354.105766]  ? syscall_return_slowpath+0x260/0x260\n[693354.105772]  ? do_page_fault+0x9b/0x270\n[693354.105779]  ? prepare_exit_to_usermode+0xf9/0x1a0\n[693354.105784]  ? enter_from_user_mode+0x30/0x30\n[693354.105793]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.105875] Allocated by task 1453337:\n[693354.106001]  kasan_kmalloc+0xa0/0xd0\n[693354.106006]  kmem_cache_alloc_node_trace+0x108/0x220\n[693354.106010]  bfq_pd_alloc+0x96/0x120\n[693354.106015]  blkcg_activate_policy+0x1b7/0x2b0\n[693354.106020]  bfq_create_group_hierarchy+0x1e/0x80\n[693354.106026]  bfq_init_queue+0x678/0x8c0\n[693354.106031]  blk_mq_init_sched+0x1f8/0x460\n[693354.106037]  elevator_switch_mq+0xe1/0x240\n[693354.106041]  elevator_switch+0x25/0x40\n[693354.106045]  elv_iosched_store+0x1a1/0x230\n[693354.106049]  queue_attr_store+0x78/0xb0\n[693354.106053]  kernfs_fop_write+0x1ab/0x280\n[693354.106056]  vfs_write+0xe7/0x230\n[693354.106060]  ksys_write+0xb0/0x140\n[693354.106064]  do_syscall_64+0x112/0x370\n[693354.106069]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.106114] Freed by task 1453336:\n[693354.106225]  __kasan_slab_free+0x130/0x180\n[693354.106229]  kfree+0x90/0x1b0\n[693354.106233]  blkcg_deactivate_policy+0x12c/0x220\n[693354.106238]  bfq_exit_queue+0xf5/0x110\n[693354.106241]  blk_mq_exit_sched+0x104/0x130\n[693354.106245]  __elevator_exit+0x45/0x60\n[693354.106249]  elevator_switch_mq+0xd6/0x240\n[693354.106253]  elevator_switch+0x25/0x40\n[693354.106257]  elv_iosched_store+0x1a1/0x230\n[693354.106261]  queue_attr_store+0x78/0xb0\n[693354.106264]  kernfs_fop_write+0x1ab/0x280\n[693354.106268]  vfs_write+0xe7/0x230\n[693354.106271]  ksys_write+0xb0/0x140\n[693354.106275]  do_syscall_64+0x112/0x370\n[693354.106280]  entry_SYSCALL_64_after_hwframe+0x65/0xca\n\n[693354.106329] The buggy address belongs to the object at ffff888be0a35580\n                 which belongs to the cache kmalloc-1k of size 1024\n[693354.106736] The buggy address is located 228 bytes inside of\n                 1024-byte region [ffff888be0a35580, ffff888be0a35980)\n[693354.107114] The buggy address belongs to the page:\n[693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0\n[693354.107606] flags: 0x17ffffc0008100(slab|head)\n[693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080\n[693354.108020] r\n---truncated---"
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      "providerMetadata": {
        "dateUpdated": "2025-05-21T08:31:45.980Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08"
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        {
          "url": "https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf"
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        {
          "url": "https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2"
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      "title": "blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47379",
    "datePublished": "2024-05-21T15:03:41.677Z",
    "dateReserved": "2024-05-21T14:58:30.811Z",
    "dateUpdated": "2025-05-21T08:31:45.980Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:32:08.606Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47379\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-11T18:56:11.466478Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-11T18:56:18.935Z\"}}], \"cna\": {\"title\": \"blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"946b81da114b8ba5c74bb01e57c0c6eca2bdc801\", \"lessThan\": \"d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"946b81da114b8ba5c74bb01e57c0c6eca2bdc801\", \"lessThan\": \"f58d305887ad7b24986d58e881f6806bb81b2bdf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"946b81da114b8ba5c74bb01e57c0c6eca2bdc801\", \"lessThan\": \"7c2c69e010431b0157c9454adcdd2305809bf9fb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"946b81da114b8ba5c74bb01e57c0c6eca2bdc801\", \"lessThan\": \"858560b27645e7e97aca37ee8f232cccd658fbd2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9d5e2d69705fed4ab527f5a283b90ae602f4e0fd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3ca6e949b751fa3dfbf475ce635364cef543738b\", \"versionType\": \"git\"}], \"programFiles\": [\"block/blk-cgroup.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.150\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.70\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"block/blk-cgroup.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08\"}, {\"url\": \"https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf\"}, {\"url\": \"https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fb\"}, {\"url\": \"https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd\\n\\nKASAN reports a use-after-free report when doing fuzz test:\\n\\n[693354.104835] ==================================================================\\n[693354.105094] BUG: KASAN: use-after-free in bfq_io_set_weight_legacy+0xd3/0x160\\n[693354.105336] Read of size 4 at addr ffff888be0a35664 by task sh/1453338\\n\\n[693354.105607] CPU: 41 PID: 1453338 Comm: sh Kdump: loaded Not tainted 4.18.0-147\\n[693354.105610] Hardware name: Huawei 2288H V5/BC11SPSCB0, BIOS 0.81 07/02/2018\\n[693354.105612] Call Trace:\\n[693354.105621]  dump_stack+0xf1/0x19b\\n[693354.105626]  ? show_regs_print_info+0x5/0x5\\n[693354.105634]  ? printk+0x9c/0xc3\\n[693354.105638]  ? cpumask_weight+0x1f/0x1f\\n[693354.105648]  print_address_description+0x70/0x360\\n[693354.105654]  kasan_report+0x1b2/0x330\\n[693354.105659]  ? bfq_io_set_weight_legacy+0xd3/0x160\\n[693354.105665]  ? bfq_io_set_weight_legacy+0xd3/0x160\\n[693354.105670]  bfq_io_set_weight_legacy+0xd3/0x160\\n[693354.105675]  ? bfq_cpd_init+0x20/0x20\\n[693354.105683]  cgroup_file_write+0x3aa/0x510\\n[693354.105693]  ? ___slab_alloc+0x507/0x540\\n[693354.105698]  ? cgroup_file_poll+0x60/0x60\\n[693354.105702]  ? 0xffffffff89600000\\n[693354.105708]  ? usercopy_abort+0x90/0x90\\n[693354.105716]  ? mutex_lock+0xef/0x180\\n[693354.105726]  kernfs_fop_write+0x1ab/0x280\\n[693354.105732]  ? cgroup_file_poll+0x60/0x60\\n[693354.105738]  vfs_write+0xe7/0x230\\n[693354.105744]  ksys_write+0xb0/0x140\\n[693354.105749]  ? __ia32_sys_read+0x50/0x50\\n[693354.105760]  do_syscall_64+0x112/0x370\\n[693354.105766]  ? syscall_return_slowpath+0x260/0x260\\n[693354.105772]  ? do_page_fault+0x9b/0x270\\n[693354.105779]  ? prepare_exit_to_usermode+0xf9/0x1a0\\n[693354.105784]  ? enter_from_user_mode+0x30/0x30\\n[693354.105793]  entry_SYSCALL_64_after_hwframe+0x65/0xca\\n\\n[693354.105875] Allocated by task 1453337:\\n[693354.106001]  kasan_kmalloc+0xa0/0xd0\\n[693354.106006]  kmem_cache_alloc_node_trace+0x108/0x220\\n[693354.106010]  bfq_pd_alloc+0x96/0x120\\n[693354.106015]  blkcg_activate_policy+0x1b7/0x2b0\\n[693354.106020]  bfq_create_group_hierarchy+0x1e/0x80\\n[693354.106026]  bfq_init_queue+0x678/0x8c0\\n[693354.106031]  blk_mq_init_sched+0x1f8/0x460\\n[693354.106037]  elevator_switch_mq+0xe1/0x240\\n[693354.106041]  elevator_switch+0x25/0x40\\n[693354.106045]  elv_iosched_store+0x1a1/0x230\\n[693354.106049]  queue_attr_store+0x78/0xb0\\n[693354.106053]  kernfs_fop_write+0x1ab/0x280\\n[693354.106056]  vfs_write+0xe7/0x230\\n[693354.106060]  ksys_write+0xb0/0x140\\n[693354.106064]  do_syscall_64+0x112/0x370\\n[693354.106069]  entry_SYSCALL_64_after_hwframe+0x65/0xca\\n\\n[693354.106114] Freed by task 1453336:\\n[693354.106225]  __kasan_slab_free+0x130/0x180\\n[693354.106229]  kfree+0x90/0x1b0\\n[693354.106233]  blkcg_deactivate_policy+0x12c/0x220\\n[693354.106238]  bfq_exit_queue+0xf5/0x110\\n[693354.106241]  blk_mq_exit_sched+0x104/0x130\\n[693354.106245]  __elevator_exit+0x45/0x60\\n[693354.106249]  elevator_switch_mq+0xd6/0x240\\n[693354.106253]  elevator_switch+0x25/0x40\\n[693354.106257]  elv_iosched_store+0x1a1/0x230\\n[693354.106261]  queue_attr_store+0x78/0xb0\\n[693354.106264]  kernfs_fop_write+0x1ab/0x280\\n[693354.106268]  vfs_write+0xe7/0x230\\n[693354.106271]  ksys_write+0xb0/0x140\\n[693354.106275]  do_syscall_64+0x112/0x370\\n[693354.106280]  entry_SYSCALL_64_after_hwframe+0x65/0xca\\n\\n[693354.106329] The buggy address belongs to the object at ffff888be0a35580\\n                 which belongs to the cache kmalloc-1k of size 1024\\n[693354.106736] The buggy address is located 228 bytes inside of\\n                 1024-byte region [ffff888be0a35580, ffff888be0a35980)\\n[693354.107114] The buggy address belongs to the page:\\n[693354.107273] page:ffffea002f828c00 count:1 mapcount:0 mapping:ffff888107c17080 index:0x0 compound_mapcount: 0\\n[693354.107606] flags: 0x17ffffc0008100(slab|head)\\n[693354.107760] raw: 0017ffffc0008100 ffffea002fcbc808 ffffea0030bd3a08 ffff888107c17080\\n[693354.108020] r\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.150\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.70\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.9\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15\", \"versionStartIncluding\": \"4.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.51\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.16.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-21T08:31:45.980Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47379\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-21T08:31:45.980Z\", \"dateReserved\": \"2024-05-21T14:58:30.811Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:03:41.677Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.