{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-52956",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-52956",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-06-24T16:28:38.414Z",
    "updatedAt": "2026-10-21T12:41:40.803Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "libceph: Fix potential out-of-bounds access in __ceph_x_decrypt()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential out-of-bounds access in __ceph_x_decrypt()\n\nIn __ceph_x_decrypt(), a part of the buffer p is interpreted as a\nceph_x_encrypt_header, and the magic field of this struct is accessed.\nThis happens without any guarantee that the buffer is large enough to\nhold this struct. The function parameter ciphertext_len represents the\nlength of the ciphertext to decrypt and is guaranteed to be at most the\nremaining size of the allocated buffer p. However, this value is not\nnecessarily greater than sizeof(ceph_x_encrypt_header). E.g., a message\nframe of type FRAME_TAG_AUTH_REPLY_MORE, that is just as long to hold\nthe ciphertext at its end with a ciphertext_len of 8 or less, can\ntrigger an out-of-bounds memory access when accessing hdr->magic.\n\nThis patch fixes the issue by adding a check to ensure that the\ndecrypted plaintext in the buffer is large enough to represent at least\nthe ceph_x_encrypt_header.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "e15fd0a11db00fc7f470a9fc804657ec3f6d04a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "759053333a40c6997c2917dcd6160bfe40d2b42e"
            },
            {
              "version": "e15fd0a11db00fc7f470a9fc804657ec3f6d04a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ebc7eddf6225b87e3aae720875f9dd40cb6b1cef"
            },
            {
              "version": "e15fd0a11db00fc7f470a9fc804657ec3f6d04a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5df268406ef38d0f92547959296577c7077dacdc"
            },
            {
              "version": "e15fd0a11db00fc7f470a9fc804657ec3f6d04a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c7e9b53aebe401970f1b5f5a01b4e021b18e8bb2"
            },
            {
              "version": "e15fd0a11db00fc7f470a9fc804657ec3f6d04a5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "821365487aa58d06bda65c676ba215d506ba9768"
            },
            {
              "version": "2982b9c92a66604ffb9fb2db54cf735133d1ef56",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.9.6",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.10"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "6.6.160",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.114",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.57",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}