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A null pointer dereference flaw was found in the Linux kernel API for the cryptographic algorithm scatterwalk functionality. This issue occurs when a user constructs a malicious packet with specific socket configuration, which could allow a local user to crash the system or escalate their privileges on the system.

CVE-2023-6176 is a vulnerability identified in the Linux kernel API related to the cryptographic algorithm scatterwalk functionality within Red Hat Enterprise Linux 8. The flaw is a null pointer dereference triggered when a local user constructs a malicious packet with a specific socket configuration. This causes the kernel to dereference a null pointer, leading to a system crash (denial of service) or potentially enabling privilege escalation. The vulnerability requires local access with low privileges, no user interaction, and has a high attack complexity, meaning exploitation is non-trivial but feasible under certain conditions. The cryptographic scatterwalk API is involved in processing cryptographic operations on data buffers, and improper handling of socket configurations can lead to this critical failure. Although no known exploits are currently in the wild, the vulnerability poses a risk to system stability and security. Red Hat Enterprise Linux 8 is widely used in enterprise environments, including European organizations, making this vulnerability relevant for critical infrastructure and business continuity. The CVSS v3.1 score of 4.7 reflects a medium severity, primarily due to the local attack vector and high complexity. The vulnerability does not impact confidentiality or integrity directly but affects availability and potentially integrity through privilege escalation. No patches are linked yet, but Red Hat is expected to release updates to address this issue.

Detailed information about CVE-2023-6176: Vulnerability in Red Hat Red Hat Enterprise Linux 8 affecting Red Hat Red Hat Enterprise Linux 8. Get real-time update

CVE-2023-6176: Vulnerability in Red Hat Red Hat Enterprise Linux 8 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-6176: Vulnerability in Red Hat Red Hat Enterprise Linux 8

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