FKIE_CVE-2026-22989

Vulnerability from fkie_nvd - Published: 2026-01-23 16:15 - Updated: 2026-01-26 15:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: nfsd: check that server is running in unlock_filesystem If we are trying to unlock the filesystem via an administrative interface and nfsd isn't running, it crashes the server. This happens currently because nfsd4_revoke_states() access state structures (eg., conf_id_hashtbl) that has been freed as a part of the server shutdown. [ 59.465072] Call trace: [ 59.465308] nfsd4_revoke_states+0x1b4/0x898 [nfsd] (P) [ 59.465830] write_unlock_fs+0x258/0x440 [nfsd] [ 59.466278] nfsctl_transaction_write+0xb0/0x120 [nfsd] [ 59.466780] vfs_write+0x1f0/0x938 [ 59.467088] ksys_write+0xfc/0x1f8 [ 59.467395] __arm64_sys_write+0x74/0xb8 [ 59.467746] invoke_syscall.constprop.0+0xdc/0x1e8 [ 59.468177] do_el0_svc+0x154/0x1d8 [ 59.468489] el0_svc+0x40/0xe0 [ 59.468767] el0t_64_sync_handler+0xa0/0xe8 [ 59.469138] el0t_64_sync+0x1ac/0x1b0 Ensure this can't happen by taking the nfsd_mutex and checking that the server is still up, and then holding the mutex across the call to nfsd4_revoke_states().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d0424066fcd294977f310964bed6f2a487fa4515
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d95499900fe52f3d461ed26b7a30bebea8f12914
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e06c9f6c0f554148d4921c2a15bd054260a054ac
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: check that server is running in unlock_filesystem\n\nIf we are trying to unlock the filesystem via an administrative\ninterface and nfsd isn\u0027t running, it crashes the server. This\nhappens currently because nfsd4_revoke_states() access state\nstructures (eg., conf_id_hashtbl) that has been freed as a part\nof the server shutdown.\n\n[   59.465072] Call trace:\n[   59.465308]  nfsd4_revoke_states+0x1b4/0x898 [nfsd] (P)\n[   59.465830]  write_unlock_fs+0x258/0x440 [nfsd]\n[   59.466278]  nfsctl_transaction_write+0xb0/0x120 [nfsd]\n[   59.466780]  vfs_write+0x1f0/0x938\n[   59.467088]  ksys_write+0xfc/0x1f8\n[   59.467395]  __arm64_sys_write+0x74/0xb8\n[   59.467746]  invoke_syscall.constprop.0+0xdc/0x1e8\n[   59.468177]  do_el0_svc+0x154/0x1d8\n[   59.468489]  el0_svc+0x40/0xe0\n[   59.468767]  el0t_64_sync_handler+0xa0/0xe8\n[   59.469138]  el0t_64_sync+0x1ac/0x1b0\n\nEnsure this can\u0027t happen by taking the nfsd_mutex and checking that\nthe server is still up, and then holding the mutex across the call to\nnfsd4_revoke_states()."
    }
  ],
  "id": "CVE-2026-22989",
  "lastModified": "2026-01-26T15:03:33.357",
  "metrics": {},
  "published": "2026-01-23T16:15:54.970",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d0424066fcd294977f310964bed6f2a487fa4515"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d95499900fe52f3d461ed26b7a30bebea8f12914"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e06c9f6c0f554148d4921c2a15bd054260a054ac"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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