CVE-2026-74466

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Close speculative mem read possibility The domain value is extracted from a given CCA or EP11 ioctl struct when a CPRB is about to be sent. Thus this is a user controlled value. Under some special conditions (custom device node used, administrative load) this value is used as an array index after bounds checking, but without speculation barrier. Add the missing array_index_nospec() call to prevent speculative execution where this domain value is used.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-08-15 13:17:51.307000

Last modified

2026-10-30 13:19:59.147000

View original CVE JSON

{
  "id": "CVE-2026-74466",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-08-15T13:17:51.307",
  "lastModified": "2026-10-30T13:19:59.147",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/zcrypt: Close speculative mem read possibility\n\nThe domain value is extracted from a given CCA or EP11 ioctl struct\nwhen a CPRB is about to be sent. Thus this is a user controlled value.\nUnder some special conditions (custom device node used, administrative\nload) this value is used as an array index after bounds checking, but\nwithout speculation barrier.\n\nAdd the missing array_index_nospec() call to prevent speculative\nexecution where this domain value is used."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/s390/crypto/zcrypt_api.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "55ac533c568a5dcaa41cd26d6e089f9dff2a7c22",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "dd1a334523ba533cba63caf593a7329d8e0e5e6e",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "59adeedebf02aa1c203de1d2b67ec45bfab7a3c6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "82b62eda68abfb7a33ac40f24b8c4128c2891148",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "cfd68b33094e1a92249850ff3c3c92ae9112a541",
              "lessThan": "e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/s390/crypto/zcrypt_api.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.18",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.8",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/55ac533c568a5dcaa41cd26d6e089f9dff2a7c22",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/59adeedebf02aa1c203de1d2b67ec45bfab7a3c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/82b62eda68abfb7a33ac40f24b8c4128c2891148",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d11a260bd7dfc6f6ccd43e1b930050f24e70cd5f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/dd1a334523ba533cba63caf593a7329d8e0e5e6e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e935cd525af4c6ed2e2c6404aa27ca19c7f39ddb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}