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Linux CVE-2026-89556

| EUVDEUVD-2026-76467
2026-09-11 Linux GHSA-whm7-hr5x-2m9w

Lifecycle Timeline

2
Patch available
Sep 11, 2026 - 21:18 EUVD
CVE Published
Sep 11, 2026 - 19:44 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

Analysis

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. …

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CVE-2026-89556 vulnerability details – vuln.today

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