CVE-2024-42112 is a vulnerability identified in the Linux kernel specifically affecting the txgbe network driver, which is used for Intel 10 Gigabit Ethernet adapters. The issue arises from improper handling of interrupt service block (isb) resources during device removal and error handling routines. When using MSI (Message Signaled Interrupts) or INTx (legacy interrupt lines), shared interrupts continue to be processed in the device removal routine before the IRQs are freed. This leads to a use-after-free condition where the isb memory is accessed after it has been freed. The vulnerability is caused by the incorrect timing of freeing these resources: the function wx_free_isb_resources() was originally called in txgbe_close(), but it should be moved to txgbe_remove() to ensure resources are freed only after interrupts are no longer handled. Additionally, the error handling path in txgbe_open() improperly frees isb resources, which has been corrected. This flaw could potentially lead to kernel memory corruption or crashes due to use-after-free, which might be exploited to cause denial of service or potentially escalate privileges if an attacker can trigger the vulnerable code path. However, there are no known exploits in the wild at this time, and the vulnerability requires specific conditions related to device removal and interrupt handling. The affected versions correspond to certain Linux kernel commits identified by their hashes, indicating this is a recent and specific patch. No CVSS score has been assigned yet, but the vulnerability is recognized and published by the Linux project and CISA has enriched the data, indicating its relevance and need for attention.

For European organizations, the impact of CVE-2024-42112 depends largely on the deployment of Linux systems using the txgbe driver, typically found in servers and network infrastructure utilizing Intel 10 Gigabit Ethernet adapters. Exploitation could lead to kernel crashes resulting in denial of service, impacting availability of critical network services. In environments where attackers have local access or can trigger device removal routines (e.g., through hot-plugging or driver reloads), there is a risk of privilege escalation or kernel memory corruption, which could compromise system integrity and confidentiality. This is particularly relevant for data centers, cloud providers, and enterprises relying on Linux-based networking equipment. The absence of known exploits reduces immediate risk, but the vulnerability should be addressed promptly to prevent future exploitation. Disruptions in network infrastructure could affect business continuity, especially in sectors like finance, telecommunications, and critical infrastructure prevalent in Europe.

European organizations should prioritize applying the patch that moves the wx_free_isb_resources() call from txgbe_close() to txgbe_remove() and fixes the improper isb free action in txgbe_open() error handling. System administrators should: 1) Identify Linux systems running kernels with the affected txgbe driver versions, especially those using Intel 10 Gigabit Ethernet adapters. 2) Deploy kernel updates or backported patches from trusted Linux distributions as soon as they become available. 3) Monitor system logs for unusual device removal or driver reload events that could indicate attempts to exploit this vulnerability. 4) Limit local access to critical systems to reduce the risk of exploitation requiring local interaction. 5) Implement strict change control and hardware management policies to avoid unintended device removals or driver reloads. 6) Use kernel hardening techniques such as Kernel Address Space Layout Randomization (KASLR) and SELinux/AppArmor to reduce exploitation likelihood. 7) Engage with hardware vendors and Linux distribution maintainers to ensure timely updates and advisories are received.