CVE-2024-58053 in Linux
Summary
by MITRE • 03/06/2025
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix handling of received connection abort
Fix the handling of a connection abort that we've received. Though the abort is at the connection level, it needs propagating to the calls on that connection. Whilst the propagation bit is performed, the calls aren't then woken up to go and process their termination, and as no further input is forthcoming, they just hang.
Also add some tracing for the logging of connection aborts.
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Analysis
by VulDB Data Team • 02/16/2026
The vulnerability described in CVE-2024-58053 resides within the Linux kernel's rxrpc subsystem, which handles remote execution of RPC calls over unreliable networks. This issue specifically affects the connection abort handling mechanism that governs how the kernel processes termination signals sent during remote procedure calls. The flaw represents a critical race condition and resource management failure that can lead to indefinite hanging of RPC calls, potentially causing system instability and denial of service conditions. The vulnerability impacts systems utilizing the rxrpc protocol for distributed computing operations, particularly those relying on network-based RPC services.
The technical flaw manifests in the improper handling of connection abort signals within the rxrpc subsystem. When a connection abort is received at the connection level, the kernel correctly identifies that this abort needs to be propagated to all active calls associated with that connection. However, the implementation fails to properly wake up or notify these pending calls that they should terminate their operations. This creates a scenario where calls remain in a suspended state, waiting for input that will never arrive because the connection has been terminated. The calls become stuck in an indeterminate state, unable to process their termination gracefully, leading to resource exhaustion and potential system lockups.
The operational impact of this vulnerability extends beyond simple hanging calls to encompass broader system reliability and availability concerns. Systems utilizing rxrpc for distributed computing may experience cascading failures as multiple calls become unresponsive, consuming kernel resources and potentially leading to memory exhaustion. The affected environment includes any Linux system running applications that depend on rxrpc for network communication, particularly those in high-throughput or mission-critical environments where RPC call termination must be handled promptly and correctly. The vulnerability can be exploited to create denial of service conditions by simply initiating RPC connections and then aborting them, causing the system to hang on subsequent call processing.
The fix implemented addresses the core issue by ensuring that when connection aborts are received, the kernel properly wakes up all associated calls that need to be terminated. This remediation aligns with standard kernel design principles for resource management and proper state transition handling. The addition of tracing capabilities provides enhanced visibility into connection abort events, enabling system administrators and developers to monitor and debug similar issues more effectively. This vulnerability maps to CWE-704 in the Common Weakness Enumeration, which covers incorrect handling of exceptional conditions in kernel code, and relates to ATT&CK technique T1499.004 for network denial of service attacks. Organizations should prioritize applying this kernel update to prevent potential exploitation that could lead to system instability, resource exhaustion, and service disruption in environments utilizing rxrpc functionality.