PT-2023-9703 · Linux+3 · Linux Kernel+3

Ira Weiny · Published 2023-10-09 · Updated 2025-02-03 · CVE-2023-52849

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 The issue is related to a NULL pointer dereference in the cxl/mem component of the Linux kernel. This occurs when the cxl memdev unregister() function is called, leading to a crash. The problem arises from the clearing of the cxl memdev driver context (@cxlds) before the subsystem is done using it, specifically when the region that the memdev is a part of is being torn down. The fix involves keeping the driver context valid until the memdev-device unregistration and the subsequent unwinding of related dependencies.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2024-10205

CVE-2023-52849

SUSE-SU-2024:2571-1

SUSE-SU-2024:2896-1

SUSE-SU-2024:2973-1

SUSE-SU-2025:20008-1

SUSE-SU-2025:20028-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1932

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52849.json · Exploit
• https://osv.dev/vulnerability/CVE-2023-52849 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-52849 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:20028-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-52849 · Vendor Advisory
• https://git.kernel.org/stable/c/20bd0198bebdd706bd4614b3933ef70d7c19618f · Patch
• https://git.kernel.org/stable/c/cad22a757029c3a1985c221a2d4a6491ad4035ae · Patch
• https://bdu.fstec.ru/vul/2024-10205 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2571-1 · Vendor Advisory
• https://git.kernel.org/stable/c/88d3917f82ed4215a2154432c26de1480a61b209 · Patch
• https://git.kernel.org/stable/c/0ca074f7d788627a4e0b047ca5fbdb5fc567220c · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-52849 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-52849 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20008-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-52849 · Security Note