fkie_cve-2022-49220
Vulnerability from fkie_nvd
Published
2025-02-26 07:00
Modified
2025-10-21 11:52
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/770d42fff12d8595adda9025a0b92091f543e775Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a7e8de822e0b1979f08767c751f6c8a9c1d4ad86Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b786abe7c67c6ef71410c8e23292b3091d616ad1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2951eaa9398415ac054b7bd80b8163b6838ead4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ec376f5c11c88c0215d173599db8449cd4196759Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2a1e0eb70c2d954176c07d75d28742bde30e9f3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
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  "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. Para solucionar este problema, llame a rcu_barrier() antes de destruir la cach\u00e9."
    }
  ],
  "id": "CVE-2022-49220",
  "lastModified": "2025-10-21T11:52:10.660",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-02-26T07:00:59.070",
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  "vulnStatus": "Analyzed",
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          "value": "NVD-CWE-noinfo"
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      "source": "nvd@nist.gov",
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}


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