PT-2025-40157 · Ext4+2 · Ext4+2

Published 2023-05-13 · Updated 2025-10-02 · CVE-2023-53450

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s ext4 implementation. A malicious fuzzer could potentially overwrite the ext4 superblock while mounted, setting the s first data block to a large number. This can cause a block group calculation underflow, triggering a kernel crash. The issue was addressed by changing the BUG ON check to an ext4 warning to prevent kernel crashes.

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

Exploit

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

BDU:2026-04550

CVE-2023-53450

Affected Products

Astra Linux

Linux Kernel

Ext4

References · 32

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53450.json · Exploit
• https://git.kernel.org/stable/c/bf2a16eb4e6d06124bd8436d4546f61539a65f29 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2023-53450 · Security Note
• https://ubuntu.com/security/CVE-2023-53450 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-53450 · Vendor Advisory
• https://git.kernel.org/stable/c/978e5e9111af18741449b81fefd531a622dd969a · Patch
• https://git.kernel.org/stable/c/ef16d8a1798db1a1604ac44ca1bd73ec6bebf483 · Patch
• https://git.kernel.org/stable/c/d87a4e4094c9879fc8acdff8ce59fdffa979c8e0 · Patch
• https://git.kernel.org/stable/c/53c14e7cc2257191ba15425c15638fc4f8abb92b · Patch
• https://osv.dev/vulnerability/CVE-2023-53450 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04550 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53450 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53450 · Vendor Advisory
• https://git.kernel.org/stable/c/185062a21976fbc38f2efd296951b02c4500cf65 · Patch
• https://git.kernel.org/stable/c/463808f237cf73e98a1a45ff7460c2406a150a0b · Patch