CVE-2026-52961 ceph: fix BUG_ON in __ceph_build_xattrs_blob() due to stale blob size

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/xattr.c"
    ],
    "versions": [
      {
        "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
        "lessThan": "7eb72425c4e3234926502eb262f9d6193ccd572c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
        "lessThan": "d5bd8b4e39cfa8b087448adcd48088065cd629d5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
        "lessThan": "368d21ae9081c93497b1c8163bed3eddcb2443ff",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d93231a6bc8a452323d5fef16cca7107ce483a27",
        "lessThan": "0c22d9511cbde746622f8e4c11aaa63fe76d45f9",
        "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/ceph/xattr.c"
    ],
    "versions": [
      {
        "version": "6.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.0",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.91",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.33",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.10",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]