PT-2023-6289 · Linux+3 · Linux Kernel+3

Yikebaer Aizezi · Published 2023-08-27 · Updated 2024-08-26 · CVE-2023-45898

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.5.4

Description The issue is related to a use-after-free error in the ext4 file system driver of the Linux kernel, specifically in the fs/ext4/extents status.c file, related to the ext4 es insert extent function. This error is associated with the reuse of previously freed memory. Exploitation of this issue could allow an attacker to impact the confidentiality, integrity, and availability of protected information.

Recommendations For Linux kernel versions prior to 6.5.4, update to version 6.5.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the ext4 file system to minimize the risk of exploitation.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

ALT-PU-2023-7004

ALT-PU-2024-6818

AZL-31566

BDU:2023-07000

CVE-2023-45898

USN-6536-1

USN-6537-1

USN-6573-1

Affected Products

Alt Linux

Linuxmint

Linux Kernel

Ubuntu

References · 48

• https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec · Patch
• https://ubuntu.com/security/CVE-2023-5178 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6536-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-39189 · Vendor Advisory
• https://spinics.net/lists/stable-commits/msg317086.html · Patch
• https://ubuntu.com/security/CVE-2023-45898 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-4244 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-45898 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-45898 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6537-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-5717 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6536-1 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/706952 · Security Note
• https://ubuntu.com/security/notices/USN-6537-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-31085 · Vendor Advisory