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A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.

CVE-2023-39193 is a vulnerability identified in the Netfilter subsystem of the Linux kernel, specifically affecting Red Hat Enterprise Linux 8. The flaw arises from the sctp_mt_check function failing to properly validate the flag_count field, leading to an out-of-bounds read condition. This vulnerability can be triggered by a local attacker who has CAP_NET_ADMIN privileges, a capability typically granted to system administrators or privileged processes. The out-of-bounds read can cause the kernel to crash (denial of service) or potentially leak sensitive kernel memory contents, resulting in information disclosure. The attack vector is local, requiring no user interaction, and the vulnerability does not affect the integrity of the system but impacts confidentiality and availability. The CVSS v3.1 score is 6.1 (medium severity), reflecting the need for local privileges but the high confidentiality impact. Currently, there are no known exploits in the wild, but the vulnerability poses a risk to environments where local privileged access is attainable. The Netfilter subsystem is critical for packet filtering and firewall functionality, so exploitation could disrupt network operations. Red Hat Enterprise Linux 8 is widely used in enterprise and government environments, making timely patching essential to prevent exploitation.

Detailed information about CVE-2023-39193: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8 affecting Red Hat Red Hat Enterprise Linux 8. Get real-time 

CVE-2023-39193: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-39193: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8

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