CVE-2026-80708 (GCVE-0-2026-80708)
Vulnerability from cvelistv5
Published
2026-08-28 06:53
Modified
2026-08-28 06:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey() The helper function _ip_cprb_helper() uses internal buffer memory for building and processing CPRBs. After use this buffer was never scrubbed which could lead to leaving for example clear key material in memory which could be exposed via tricky reuse of this same memory. Extend the _ip_cprb_helper() function with another parameter 'scrub' used to steer scrubbing of this buffer. So now the caller has the opportunity to decide if scrubbing is needed or not. Extend the clear key to secure key token import process in function cca_clr2cipherkey() to tell the helper function from above to scrub the cprb buffer when the clear key value is part of the request data. Add explicit scrubbing on return from function cca_clr2cipherkey() for the random EXOR buffer and the cprb buffer. Overall this cleans the internal used buffer in case of clear key import to prevent sensitive data to get exposed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
Version: 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/s390/crypto/zcrypt_ccamisc.c"
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          "vendor": "Linux",
          "versions": [
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            },
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              "version": "0",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()\n\nThe helper function _ip_cprb_helper() uses internal buffer memory for\nbuilding and processing CPRBs. After use this buffer was never\nscrubbed which could lead to leaving for example clear key material in\nmemory which could be exposed via tricky reuse of this same memory.\n\nExtend the _ip_cprb_helper() function with another parameter \u0027scrub\u0027\nused to steer scrubbing of this buffer. So now the caller has the\nopportunity to decide if scrubbing is needed or not.\n\nExtend the clear key to secure key token import process in function\ncca_clr2cipherkey() to tell the helper function from above to scrub\nthe cprb buffer when the clear key value is part of the request data.\n\nAdd explicit scrubbing on return from function cca_clr2cipherkey() for\nthe random EXOR buffer and the cprb buffer.\n\nOverall this cleans the internal used buffer in case of clear key\nimport to prevent sensitive data to get exposed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T06:53:08.843Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8e1c0def77b7450be0ed607ed0d7bae629d30020"
        },
        {
          "url": "https://git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010"
        },
        {
          "url": "https://git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1"
        },
        {
          "url": "https://git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644"
        },
        {
          "url": "https://git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac"
        },
        {
          "url": "https://git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665"
        }
      ],
      "title": "s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80708",
    "datePublished": "2026-08-28T06:53:08.843Z",
    "dateReserved": "2026-08-26T14:34:25.787Z",
    "dateUpdated": "2026-08-28T06:53:08.843Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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