{
  "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-2022-50564",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50564",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-22T13:23:22.703Z",
    "updatedAt": "2026-05-11T19:21:51.788Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "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": "s390/netiucv: Fix return type of netiucv_tx()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/netiucv: Fix return type of netiucv_tx()\n\nWith clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),\nindirect call targets are validated against the expected function\npointer prototype to make sure the call target is valid to help mitigate\nROP attacks. If they are not identical, there is a failure at run time,\nwhich manifests as either a kernel panic or thread getting killed. A\nproposed warning in clang aims to catch these at compile time, which\nreveals:\n\n  drivers/s390/net/netiucv.c:1854:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict]\n          .ndo_start_xmit         = netiucv_tx,\n                                    ^~~~~~~~~~\n\n->ndo_start_xmit() in 'struct net_device_ops' expects a return type of\n'netdev_tx_t', not 'int'. Adjust the return type of netiucv_tx() to\nmatch the prototype's to resolve the warning and potential CFI failure,\nshould s390 select ARCH_SUPPORTS_CFI_CLANG in the future.\n\nAdditionally, while in the area, remove a comment block that is no\nlonger relevant.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f13d870fce90f01cf930bfaffecc8185ae0be21c"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eccc88c0efe407e579291792ad07a7dedc0f63f0"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "85d392710275355425df8618ccbebbc336f5acc5"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4bee3c75d5bf7c2b5dc0b520410eb40449e5da31"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ac0217ca9186c2f9af9a0113a331a42aa847894"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dfbf0122ea1b9b3e73fa22c8ff6bd888935c54fc"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e7a849f740e3576e79cba403697e916f4c3a6f12"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d034fa43af92fc46a81d882f46d9cc3e4ffdbbcc"
            },
            {
              "version": "dc1f8bf68b311b1537cb65893430b6796118498a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "88d86d18d7cf7e9137c95f9d212bb9fff8a1b4be"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.32",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.32"
            },
            {
              "version": "4.9.337",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.303",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.229",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.163",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.86",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1.2",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}