CVE-2026-89679 nfsd: fix null dereference in nfsd4_setattr for deleg timestamp attrs

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfsd/nfs4proc.c"
    ],
    "versions": [
      {
        "version": "7e13f4f8d27dc02fb88666f603c53ca749d56f92",
        "lessThan": "3c5119b799a7f57db332b2c31e806de16c869f0f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7e13f4f8d27dc02fb88666f603c53ca749d56f92",
        "lessThan": "3c896db123892256fd39af0ee8c2d02c63539983",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "7e13f4f8d27dc02fb88666f603c53ca749d56f92",
        "lessThan": "fe456c8c0931bb3e8a03d429920e87fd85747fba",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nfsd/nfs4proc.c"
    ],
    "versions": [
      {
        "version": "6.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.14",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.50",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]