vulnerability cve 2023 53221

About this tag
The tag vulnerability cve 2023 53221 covers a specific Linux kernel vulnerability in the eBPF fentry attach path. This bug can leave allocated BPF trampoline images when an fentry attach fails, causing a persistent memory leak. If exploited at scale, the memory leak can deny availability to services and systems. The vulnerability is local and impacts availability. It has been reproduced and cataloged by multiple vendors and vulnerability databases. Administrators should remediate it promptly. The tag content focuses on the technical details of CVE-2023-53221, its impact on Linux systems, and the need for patching.

  1. CVE-2023-53221: Linux eBPF fentry Trampoline Memory Leak and Availability Impact

    A subtle bug in the Linux kernel’s eBPF fentry attach path — tracked as CVE-2023-53221 — can leave behind allocated BPF trampoline images when an fentry attach fails, producing a persistent memory leak that, if abused at scale, can deny availability to services and systems; this behavior is...
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