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

Vulnerability from cvelistv5 – Published: 2025-12-24 12:23 – Updated: 2026-05-11 19:54
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 CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
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          "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  ..."
        }
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    "state": "PUBLISHED"
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            "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  ..."
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        "id": "CVE-2023-54056",
        "lastModified": "2026-06-17T06:46:43.437",
        "metrics": {},
        "published": "2025-12-24T13:16:07.320",
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    "redhat_vex": {
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      "current_release_date": "2026-06-30T10:13:41+00:00",
      "cve": "CVE-2023-54056",
      "id": "CVE-2023-54056",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: kheaders: Use array declaration instead of char",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54056.json",
      "version": "3"
    },
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      "current_release_date": "2026-08-29T02:04:10Z",
      "cve": "CVE-2023-54056",
      "id": "CVE-2023-54056",
      "initial_release_date": "2025-12-25T00:56:40Z",
      "product_status:known_affected": "201",
      "product_status:known_not_affected": "359",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-54056",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54056.json",
      "version": "13"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.