CVE-2023-54056 (GCVE-0-2023-54056)
Vulnerability from cvelistv5
Published
2025-12-24 12:23
Modified
2025-12-24 12:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kheaders: Use array declaration instead of char Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else). This was seen with: $ cat /sys/kernel/kheaders.tar.xz >> /dev/null detected buffer overflow in memcpy kernel BUG at lib/string_helpers.c:1027! ... RIP: 0010:fortify_panic+0xf/0x20 [...] Call Trace: <TASK> ikheaders_read+0x45/0x50 [kheaders] kernfs_fop_read_iter+0x1a4/0x2f0 ...
References
Impacted products
Vendor Product Version
Linux Linux Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
Version: 43d8ce9d65a54846d378545770991e65838981e0
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/kheaders.c"
          ],
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "lessThanOrEqual": "5.10.*",
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              "version": "5.10.180",
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            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.28",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.15",
              "versionType": "semver"
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              "lessThanOrEqual": "6.3.*",
              "status": "unaffected",
              "version": "6.3.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.4",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkheaders: Use array declaration instead of char\n\nUnder CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination\nand source buffers. Defining kernel_headers_data as \"char\" would trip\nthis check. Since these addresses are treated as byte arrays, define\nthem as arrays (as done everywhere else).\n\nThis was seen with:\n\n  $ cat /sys/kernel/kheaders.tar.xz \u003e\u003e /dev/null\n\n  detected buffer overflow in memcpy\n  kernel BUG at lib/string_helpers.c:1027!\n  ...\n  RIP: 0010:fortify_panic+0xf/0x20\n  [...]\n  Call Trace:\n   \u003cTASK\u003e\n   ikheaders_read+0x45/0x50 [kheaders]\n   kernfs_fop_read_iter+0x1a4/0x2f0\n  ..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T12:23:04.559Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/719459877d58c8aced5845c1e5b98d8d87d09197"
        },
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          "url": "https://git.kernel.org/stable/c/fcd2da2e6bf2640a31a2a5b118b50dc3635c707b"
        },
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        },
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          "url": "https://git.kernel.org/stable/c/82d2e01b95c439fe55fab5e04fc83387c42d3a48"
        },
        {
          "url": "https://git.kernel.org/stable/c/b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb"
        }
      ],
      "title": "kheaders: Use array declaration instead of char",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54056",
    "datePublished": "2025-12-24T12:23:04.559Z",
    "dateReserved": "2025-12-24T12:21:05.091Z",
    "dateUpdated": "2025-12-24T12:23:04.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-54056\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:07.320\",\"lastModified\":\"2025-12-24T13:16:07.320\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nkheaders: Use array declaration instead of char\\n\\nUnder CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination\\nand source buffers. Defining kernel_headers_data as \\\"char\\\" would trip\\nthis check. Since these addresses are treated as byte arrays, define\\nthem as arrays (as done everywhere else).\\n\\nThis was seen with:\\n\\n  $ cat /sys/kernel/kheaders.tar.xz \u003e\u003e /dev/null\\n\\n  detected buffer overflow in memcpy\\n  kernel BUG at lib/string_helpers.c:1027!\\n  ...\\n  RIP: 0010:fortify_panic+0xf/0x20\\n  [...]\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ikheaders_read+0x45/0x50 [kheaders]\\n   kernfs_fop_read_iter+0x1a4/0x2f0\\n  ...\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4a07d2d511e2703efd4387891d49e0326f1157f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/719459877d58c8aced5845c1e5b98d8d87d09197\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/82d2e01b95c439fe55fab5e04fc83387c42d3a48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b9f6845a492de20679b84bda6b08be347c5819da\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d6d1af6b8611801b585c53c0cc63626c8d339e96\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fcd2da2e6bf2640a31a2a5b118b50dc3635c707b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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