{
  "cveId": "CVE-2026-89672",
  "url": "https://patchblox.com/security/cve/CVE-2026-89672",
  "summary": "CVE-2026-89672 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-89672, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  nfsd: gate nfs2 setacl by argp-\u003Emask  The NFSACL...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nfsd: gate nfs2 setacl by argp-\u003Emask  The NFSACL v2 SETACL path shares the decoder convention used by its v3 sibling: nfsaclsvc_decode_setaclargs() fills in argp-\u003Eacl_access only when NFS_ACL is set in the request mask and argp-\u003Eacl_default only when NFS_DFACL is set, leaving the other pointer NULL because the argument buffer is zeroed up to pc_argzero before decode.  nfsacld_proc_setacl() then hands both pointers to set_posix_acl() unconditionally. set_posix_acl(idmap, dentry, type, NULL) is the VFS \u0022remove this ACL type\u0022 operation, so an omitted arm is indistinguishable from an explicit request to delete that ACL. A SETACL carrying only NFS_ACL silently strips the directory\u0027s default ACL; mask=0 strips both.  This is the same defect just fixed in nfsd3_proc_setacl(); apply the same remedy. Gate each set_posix_acl() call on its mask bit and initialize error to 0 so that a request with neither bit set leaves the on-disk ACLs untouched and returns success. The out_drop_lock path and the unconditional posix_acl_release() in nfsaclsvc_release_setacl() already tolerate the skipped arms.",
  "published": "2026-09-11T20:19:53Z",
  "severity": "critical",
  "cvss": 9.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss": 0.00596,
  "epssPercentile": 0.48732,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}