Smbios Version 26

The SMBIOS Version 2.6 (System Management BIOS) specification, released by the Distributed Management Task Force (DMTF), is a foundational standard for hardware management that replaced the older DMI BIOS approach. It provides a standardized way for system firmware to communicate detailed hardware information to the operating system without requiring risky direct hardware probing. Key Features & Enhancements

5. Possible typo or joke post

Some bug reports or forum posts have “SMBIOS version 26” as a copy-paste error — they meant BIOS version 26, or SMBIOS 2.6 (which is real). smbios version 26

String Length: In version 2.6, individual text strings are limited to 64 characters. This limit was removed in version 2.7. The SMBIOS Version 2

While almost entirely replaced by newer 3.x versions in modern PCs, it remains a common reference point for specific legacy environments and specialized communities like Hackintosh users. Key Features & Changes in 2.6 Memory Device (Type 17)

Conclusion

3. Could be a custom or embedded firmware quirk

On some non-x86 architectures, or very old/niche embedded systems (e.g., legacy EFI, UEFI 2.0 era, or proprietary BIOS), the SMBIOS version field is sometimes hardcoded or misreported.
Version 26 in decimal might be an internal firmware build number mapped to that field.

dmidecode -s smbios-version

Memory Device (Type 17)