CVE-2026-34962

Summary

barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.

Affected Software

Weaknesses

• CWE-835: CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/barebox/barebox
• https://github.com/barebox/barebox/releases/tag/v2026.04.0
• https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service

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