PT-2026-45548 · Undefined · Undefined

CVE-2025-70099 · Published 2026-06-01 · Updated 2026-07-22

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions lwext4 version 1.0.0

Description A NULL pointer dereference occurs in the ext4 dir en get name len() function within the include/ext4 dir.h file. This issue allows an attacker to trigger a denial of service by providing a specially crafted EXT4 filesystem image containing malformed directory entries. The flaw exists because the code fails to validate the directory entry pointer before accessing the name len field, leading to a segmentation fault during directory iteration.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2025-70099

Affected Products

Undefined

References · 8

• 🔥 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
• https://t.me/cveNotify/211636 · Telegram Post
• http://openwall.com/lists/oss-security/2026/06/29/4 · Note
• https://twitter.com/oss_security/status/2072379584230682874 · Twitter Post
• https://t.me/cveNotify/179189 · Telegram Post