PT-2026-45548 · Undefined · Undefined

Published 2026-06-01 · Updated 2026-06-01 · CVE-2025-70099

Mitre

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

A NULL pointer dereference in the ext4 dir en get name len function in include/ext4 dir.h of lwext4 1.0.0 allows attackers to cause a denial of service by supplying a specially crafted EXT4 filesystem image with malformed directory entries. During directory iteration, the code may fail to validate the directory entry pointer before accessing the name len field, resulting in a segmentation fault. This affects versions based on (or equivalent to) the 2016-era codebase (1.0.0).

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2025-70099

Affected Products

Undefined

References · 4

• 🔥 https://github.com/gkostka/lwext4/issues/89 · Exploit
• 🔥 https://github.com/sigdevel/pocs/blob/main/res/lwext4/1/sig11_2_1_lwext4_ext4_dir_h_126 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-70099 · Security Note
• https://infosec.exchange/@sigdevel/116668939725424227 · Note