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CVE-2026-90042 ceph: properly decrypt filenames in vmalloc() buffers

🗓️ 16 Sep 2026 10:33:40Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 42 Views

ceph_fname_to_usr passes vmalloc buffers to fscrypt scatterlist API causing kernel oopses.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/ceph/crypto.c",
      "fs/ceph/mds_client.c"
    ],
    "versions": [
      {
        "version": "457117f077c6749d1e28469eae91fb69c9806768",
        "lessThan": "93729594af506557a86f8b603be7ac5f3370eeca",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "457117f077c6749d1e28469eae91fb69c9806768",
        "lessThan": "110747ff535e3d98ac17d68dbd056bb6ef000e23",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "457117f077c6749d1e28469eae91fb69c9806768",
        "lessThan": "3b467c68803d7c7e82678289e598afd44faa6101",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "457117f077c6749d1e28469eae91fb69c9806768",
        "lessThan": "e939fc6a7bd969a58a150b7f188c1047138403e3",
        "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/crypto.c",
      "fs/ceph/mds_client.c"
    ],
    "versions": [
      {
        "version": "6.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.111",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.51",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.5",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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21 Sep 2026 13:15Current
CVSS 3.19.8
EPSS0.00671
42