# Grzegorz Kostka Lwext4 vulnerabilities

Source: https://junglewise.ai/threats/technologies/lwext4  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/lwext4.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Grzegorz Kostka Lwext4: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2025-70101, was published on 3 June 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (0 critical, 0 exploited in the wild)

## About Grzegorz Kostka Lwext4

A lightweight ext2/3/4 filesystem library for microcontrollers and embedded systems.

## Latest Grzegorz Kostka Lwext4 vulnerabilities

- [CVE-2025-70101: gkostka lwext4 out-of-bounds read in ext4_ext_binsearch_idx](https://junglewise.ai/threats/cve-2025-70101-gkostka-lwext4-out-of-bounds-read-in-ext4-ext-binsearch-idx) (info, CVSS 5.5, published 3 Jun 2026)
- [CVE-2025-70100: lwext4 divide-by-zero in ext4_block_set_lb_size](https://junglewise.ai/threats/cve-2025-70100-lwext4-divide-by-zero-in-ext4-block-set-lb-size) (info, CVSS 5.5, published 3 Jun 2026)
- [CVE-2025-70099: lwext4 NULL pointer dereference in ext4_dir_en_get_name_len](https://junglewise.ai/threats/cve-2025-70099-lwext4-null-pointer-dereference-in-ext4-dir-en-get-name-len) (info, CVSS 0, published 1 Jun 2026)

## Most severe Grzegorz Kostka Lwext4 vulnerabilities

- [CVE-2025-70101: gkostka lwext4 out-of-bounds read in ext4_ext_binsearch_idx](https://junglewise.ai/threats/cve-2025-70101-gkostka-lwext4-out-of-bounds-read-in-ext4-ext-binsearch-idx) (info, CVSS 5.5, published 3 Jun 2026)
- [CVE-2025-70100: lwext4 divide-by-zero in ext4_block_set_lb_size](https://junglewise.ai/threats/cve-2025-70100-lwext4-divide-by-zero-in-ext4-block-set-lb-size) (info, CVSS 5.5, published 3 Jun 2026)
- [CVE-2025-70099: lwext4 NULL pointer dereference in ext4_dir_en_get_name_len](https://junglewise.ai/threats/cve-2025-70099-lwext4-null-pointer-dereference-in-ext4-dir-en-get-name-len) (info, CVSS 0, published 1 Jun 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Grzegorz Kostka Lwext4 vulnerabilities", https://junglewise.ai/threats/technologies/lwext4, 9 November 2026.