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CVE-2026-89556 (GCVE-0-2026-89556)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:44 – Updated: 2026-09-13 06:24
VLAI
Title
module: validate string table section types
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c92aab819d56d51631f0484ed7af11d9d8ff4cb0 , < 50d0aa7d25ba4bc3606f150cd69755068e79f97f (git)
Affected: c92aab819d56d51631f0484ed7af11d9d8ff4cb0 , < e4496dda2c6d0acf7ba5fbce14a2723a8935ceee (git)
Affected: c92aab819d56d51631f0484ed7af11d9d8ff4cb0 , < 9a5ff45689329835f874cefe5174e577d141d423 (git)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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              "operator": "OR"
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          "value": "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."
        }
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        },
        {
          "url": "https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423"
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    "cveId": "CVE-2026-89556",
    "datePublished": "2026-09-11T19:44:29.080Z",
    "dateReserved": "2026-09-11T19:38:34.724Z",
    "dateUpdated": "2026-09-13T06:24:03.161Z",
    "state": "PUBLISHED"
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}



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