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A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.

CVE-2023-5156 is a vulnerability identified in the GNU C Library component of Red Hat Enterprise Linux 6, introduced inadvertently by a recent fix addressing CVE-2023-4806. The flaw manifests as a missing release of allocated memory after its effective lifetime, resulting in a memory leak. Over time, this leak can cause applications relying on the affected library to exhaust available memory resources, leading to crashes or denial of service conditions. The vulnerability is exploitable remotely without requiring authentication or user interaction, increasing its risk profile. The CVSS v3.1 score of 7.5 reflects a high severity primarily due to its impact on availability (A:H), with no impact on confidentiality or integrity. While no known exploits have been reported in the wild, the presence of this flaw in a widely deployed enterprise operating system like RHEL 6 means that affected organizations could face service disruptions if exploited. The vulnerability is particularly concerning because it stems from a fix to a previous issue, highlighting the complexity of maintaining secure memory management in critical system libraries. The lack of patches at the time of publication necessitates interim mitigations to monitor and manage memory usage proactively.

Detailed information about CVE-2023-5156: Missing Release of Memory after Effective Lifetime in Red Hat Red Hat Enterprise Linux 6 affecting Red Hat Red Hat Ent

CVE-2023-5156: Missing Release of Memory after Effective Lifetime in Red Hat Red Hat Enterprise Linux 6 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-5156: Missing Release of Memory after Effective Lifetime in Red Hat Red Hat Enterprise Linux 6

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