CVE-2023-54056 (GCVE-0-2023-54056)

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2025-12-24 12:23
VLAI?
Title
kheaders: Use array declaration instead of char
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 ...
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < 719459877d58c8aced5845c1e5b98d8d87d09197 (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < fcd2da2e6bf2640a31a2a5b118b50dc3635c707b (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < 4a07d2d511e2703efd4387891d49e0326f1157f3 (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < b9f6845a492de20679b84bda6b08be347c5819da (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < d6d1af6b8611801b585c53c0cc63626c8d339e96 (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < 82d2e01b95c439fe55fab5e04fc83387c42d3a48 (git)
Affected: 43d8ce9d65a54846d378545770991e65838981e0 , < b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb (git)
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    Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.4.243 , ≤ 5.4.* (semver)
Unaffected: 5.10.180 , ≤ 5.10.* (semver)
Unaffected: 5.15.111 , ≤ 5.15.* (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/kheaders.c"
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          "vendor": "Linux",
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              "versionType": "semver"
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        {
          "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"
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          "url": "https://git.kernel.org/stable/c/719459877d58c8aced5845c1e5b98d8d87d09197"
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          "url": "https://git.kernel.org/stable/c/b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb"
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    "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"
  },
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  "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\":\"2025-12-29T15:58:34.503\",\"vulnStatus\":\"Awaiting Analysis\",\"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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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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