PT-2023-9383 · Linux+5 · Linux Kernel+5

Cezary Rojewski · Published 2023-10-06 · Updated 2025-09-29 · CVE-2023-52806

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 error in the ALSA component of the Linux kernel. This error occurs when assigning a stream, particularly when a user attempts to assign a COUPLED stream, which is not blocked by AudioDSP drivers. The supplied substream instance may be a stub, leading to a null pointer dereference when code-loading. This could allow an attacker to cause a denial of service.

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

ALSA-2025_16880

ALT-PU-2023-7921

BDU:2024-06978

CVE-2023-52806

OPENSUSE-SU-2024_2189-1

SUSE-SU-2024:2008-1

SUSE-SU-2024:2011-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2189-1

SUSE-SU-2024:2190-1

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

USN-6972-1

USN-6972-2

USN-6972-3

USN-6972-4

USN-6976-1

Affected Products

Alt Linux

Astra Linux

Linux Kernel

Red Os

Suse

Ubuntu

References · 2584

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52806.json · Exploit
• https://ubuntu.com/security/CVE-2024-27013 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6972-3 · Vendor Advisory
• https://ubuntu.com/security/CVE-2024-26903 · Vendor Advisory
• https://git.kernel.org/stable/c/43b91df291c8802268ab3cfd8fccfdf135800ed4 · Patch
• https://ubuntu.com/security/CVE-2023-52644 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46924 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-52806 · Security Note
• https://ubuntu.com/security/CVE-2024-26929 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6972-2 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20028-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6972-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47173 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47521 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-46904 · Vendor Advisory