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CVE-2024-58239 is an improper control-flow flaw in the Linux kernel TLS receive path. When process_rx_list processes an initial non-DATA record from the receive list while another record of the same type remains queued, subsequent receive-loop processing can merge records that should remain separate. The fix checks the record type and terminates the relevant processing path when the initial operation handled a non-DATA record.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a full exploit chain for CVE-2024-58239, a Linux kernel TLS stack vulnerability that allows local privilege escalation. The exploit is operational and was tested in the kernelCTF environment. The main exploit is implemented in C++ (client.cpp and server.cpp), with supporting scripts in Python and Bash for automation and testing. The exploit works by running an attacker-controlled server (server.cpp) and a client (client.cpp) on the target. The client connects to the server over a TLS-enabled TCP connection, leveraging a bug in the kernel's TLS stack to achieve memory corruption. The exploit overwrites /proc/sys/kernel/core_pattern to execute a root shell upon a triggered crash, thus escalating privileges to root. The payload is a local shell, and the exploit demonstrates a 50% success rate in repeated tests, with instability due to kernel mitigations. The repository also includes demo code for TLS communication, test scripts (test.py, calc_AC_rate.py), and QEMU/runner scripts for local testing. The exploit is not part of a framework and is a standalone operational exploit. Key fingerprintable endpoints include /proc/sys/kernel/core_pattern, /proc/self/exe, and the use of local and remote TCP/IP addresses and HTTP for payload delivery.
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A Linux kernel TLS receive-path flaw in which processing a non-DATA record could lead to records of the same type being merged incorrectly. The stated impact is local availability loss, with a CVSS v3 score of 5.5.
A Linux kernel TLS receive-path flaw in which processing non-DATA records from the receive list could cause records of the same type to be merged improperly, potentially affecting availability.
A Linux kernel TLS receive-path vulnerability involving handling of non-DATA records in the receive list. Improper processing could merge queued non-DATA records and affect availability.
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Cross-references every affected SKU, including bundled OEM variants.
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