Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L N R U N N H 5.5 .0016 5.9 —
AFFECTED Product Versions Fixed n/a n/a – —
TIMELINE Jan 9 Reserved by mitre Jun 3 EXPLOIT PUBLISHED — CVE-2025-70100. Public exploit reference added. Jun 3 Published (CNA: mitre)
A divide-by-zero vulnerability in the ext4_block_set_lb_size function in src/ext4_blockdev.c of the lwext4 1.0.0 library allows attackers to cause a denial of service by providing a malformed ext4 filesystem image that results in a zero logical block size. The vulnerability is triggered during mount or image processing and leads to a Floating-Point Exception (FPE) under sanitizers or a runtime crash in standard builds due to missing validation of lb_size.
| Date | Event | Detail |
|---|---|---|
| January 9, 2026 | Reserved | Reserved by mitre |
| June 3, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2025-70100. Public exploit reference added. |
| June 3, 2026 | Published | Published (CNA: mitre) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| n/a | n/a | — | n/a | — |
Authoritative record: CVE-2025-70100 at cve.org
Weaknesses: CWE-369
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2025-70100 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.