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CVE-2022-49220 (GCVE-0-2022-49220)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-05-11 18:55
VLAI
Title
dax: make sure inodes are flushed before destroy cache
Summary
In the Linux kernel, the following vulnerability has been resolved: dax: make sure inodes are flushed before destroy cache A bug can be triggered by following command $ modprobe nd_pmem && modprobe -r nd_pmem [ 10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown() [ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node) [ 10.062433] Call Trace: [ 10.062673] dump_stack_lvl+0x34/0x44 [ 10.062865] slab_err+0x90/0xd0 [ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0 [ 10.063848] kmem_cache_destroy+0x4a/0x110 [ 10.064058] __x64_sys_delete_module+0x265/0x300 This is caused by dax_fs_exit() not flushing inodes before destroy cache. To fix this issue, call rcu_barrier() before destroy cache.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < 770d42fff12d8595adda9025a0b92091f543e775 (git)
Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < ec376f5c11c88c0215d173599db8449cd4196759 (git)
Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < e2951eaa9398415ac054b7bd80b8163b6838ead4 (git)
Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < f2a1e0eb70c2d954176c07d75d28742bde30e9f3 (git)
Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < b786abe7c67c6ef71410c8e23292b3091d616ad1 (git)
Affected: 7b6be8444e0f0dd675b54d059793423d3c9b4c03 , < a7e8de822e0b1979f08767c751f6c8a9c1d4ad86 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.4.189 , ≤ 5.4.* (semver)
Unaffected: 5.10.110 , ≤ 5.10.* (semver)
Unaffected: 5.15.33 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndax: make sure inodes are flushed before destroy cache\n\nA bug can be triggered by following command\n\n$ modprobe nd_pmem \u0026\u0026 modprobe -r nd_pmem\n\n[   10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown()\n[   10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node)\n[   10.062433] Call Trace:\n[   10.062673]  dump_stack_lvl+0x34/0x44\n[   10.062865]  slab_err+0x90/0xd0\n[   10.063619]  __kmem_cache_shutdown+0x13b/0x2f0\n[   10.063848]  kmem_cache_destroy+0x4a/0x110\n[   10.064058]  __x64_sys_delete_module+0x265/0x300\n\nThis is caused by dax_fs_exit() not flushing inodes before destroy cache.\nTo fix this issue, call rcu_barrier() before destroy cache."
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49220\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:00:59.070\",\"lastModified\":\"2026-06-17T05:17:25.490\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndax: make sure inodes are flushed before destroy cache\\n\\nA bug can be triggered by following command\\n\\n$ modprobe nd_pmem \u0026\u0026 modprobe -r nd_pmem\\n\\n[   10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown()\\n[   10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node)\\n[   10.062433] Call Trace:\\n[   10.062673]  dump_stack_lvl+0x34/0x44\\n[   10.062865]  slab_err+0x90/0xd0\\n[   10.063619]  __kmem_cache_shutdown+0x13b/0x2f0\\n[   10.063848]  kmem_cache_destroy+0x4a/0x110\\n[   10.064058]  __x64_sys_delete_module+0x265/0x300\\n\\nThis is caused by dax_fs_exit() not flushing inodes before destroy cache.\\nTo fix this issue, call rcu_barrier() before destroy cache.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dax: aseg\u00farese de que los inodos se vac\u00eden antes de destruir la cach\u00e9. Se puede activar un error con el siguiente comando $ modprobe nd_pmem \u0026amp;\u0026amp; modprobe -r nd_pmem [ 10.060014] ERROR dax_cache (no contaminado): objetos restantes en dax_cache en __kmem_cache_shutdown() [ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node) [ 10.062433] Seguimiento de llamadas: [ 10.062673] dump_stack_lvl+0x34/0x44 [ 10.062865] slab_err+0x90/0xd0 [ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0 [ 10.063848] kmem_cache_destroy+0x4a/0x110 [ 10.064058] __x64_sys_delete_module+0x265/0x300 Esto se debe a que dax_fs_exit() no vac\u00eda los inodos antes de destruir la cach\u00e9. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:43:04+00:00",
      "cve": "CVE-2022-49220",
      "id": "CVE-2022-49220",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: dax: make sure inodes are flushed before destroy cache",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49220.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:29:39Z",
      "cve": "CVE-2022-49220",
      "id": "CVE-2022-49220",
      "initial_release_date": "2025-02-27T03:10:27Z",
      "product_status:known_affected": "630",
      "product_status:known_not_affected": "180",
      "product_status:recommended": "55",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49220",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49220.json",
      "version": "35"
    }
  }
}



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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.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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