PT-2023-9101 · Linux+5 · Linux Kernel+5

Eric Biggers · Published 2023-11-17 · Updated 2025-09-29 · CVE-2023-52436

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 (affected versions not specified)

Description The issue is related to the f2fs file system in the Linux kernel, where an unused xattr space is not always zeroed, leading to potential security risks. When setting an xattr, the xattr list is explicitly null-terminated to eliminate the fragile assumption that the unused xattr space is always zeroed. This vulnerability may allow an attacker to impact the confidentiality, integrity, and availability of protected information.

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

Exploit

Weakness Enumeration

CWE-456

Related Identifiers

ALSA-2025_16880

ALT-PU-2024-17576

BDU:2024-03704

CVE-2023-52436

DLA-3840-1

DLA-3841-1

OESA-2024-1239

OESA-2024-1240

OESA-2024-1244

OESA-2024-1283

OESA-2024-1284

OESA-2024-1285

USN-6688-1

USN-6724-1

USN-6724-2

USN-6725-1

USN-6725-2

USN-6726-1

USN-6726-2

USN-6726-3

USN-6926-1

USN-6926-2

USN-6926-3

USN-6938-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 204

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52436.json · Exploit
• https://osv.dev/vulnerability/USN-6938-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26581 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26591 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52594 · Vendor Advisory
• https://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a · Patch
• https://ubuntu.com/security/CVE-2023-52445 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52457 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-3841-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52436 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26589 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-52436 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6688-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52620 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46960 · Vendor Advisory