# CVE-2026-89556

## Summary

- **CVE ID:** CVE-2026-89556
- **Severity:** UNKNOWN
- **CVSS Score:** 1.51
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 16, 2026

## Description

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.

## Affected Products

- Linux — Linux (1da177e4c3f41524e886b7f1b8a0c1fc7321cac2)
- Linux — Linux (0)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (c92aab819d56d51631f0484ed7af11d9d8ff4cb0)
- Linux — Linux (6.13)

## References

- [CNA](https://git.kernel.org/stable/c/50d0aa7d25ba4bc3606f150cd69755068e79f97f)
- [CNA](https://git.kernel.org/stable/c/e4496dda2c6d0acf7ba5fbce14a2723a8935ceee)
- [CNA](https://git.kernel.org/stable/c/9a5ff45689329835f874cefe5174e577d141d423)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 9.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._