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GHSA-WHM7-HR5X-2M9W

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

module: validate string table section types

In elf_validity_cache_sechdrs, section sizes and offsets are validated, unless the section type is SHT_NULL or SHT_NOBITS.

Later, elf_validity_cache_secstrings and elf_validity_cache_index_str access the section name table (.shstrtab) and symbol string table (.strtab) headers without first ensuring that their types are SHT_STRTAB. If a section type is SHT_NULL or SHT_NOBITS, sh_offset has not been validated and may reference out-of-bounds memory when dereferenced in elf_validity_cache_secstrings or elf_validity_cache_strtab.

Validate that both string section headers are of type SHT_STRTAB before caching them.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89556"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:39Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmodule: validate string table section types\n\nIn elf_validity_cache_sechdrs, section sizes and offsets are validated,\nunless the section type is SHT_NULL or SHT_NOBITS.\n\nLater, elf_validity_cache_secstrings and elf_validity_cache_index_str\naccess the section name table (.shstrtab) and symbol string table\n(.strtab) headers without first ensuring that their types are\nSHT_STRTAB. If a section type is SHT_NULL or SHT_NOBITS, sh_offset has\nnot been validated and may reference out-of-bounds memory when\ndereferenced in elf_validity_cache_secstrings or\nelf_validity_cache_strtab.\n\nValidate that both string section headers are of type SHT_STRTAB before\ncaching them.",
  "id": "GHSA-whm7-hr5x-2m9w",
  "modified": "2026-09-11T21:31:31Z",
  "published": "2026-09-11T21:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89556"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50d0aa7d25ba4bc3606f150cd69755068e79f97f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4496dda2c6d0acf7ba5fbce14a2723a8935ceee"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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