CVE-2026-63864

A vulnerability in the Linux kernel affects the handling of tail call instructions in BPF, where the function visit_tailcall_insn() fails to properly check its return value, potentially leading to unhandled errors. This could allow an attacker to exploit the error propagation, resulting in system instability or unauthorized access. Organizations using affected Linux distributions or F5 products should prioritize patching this vulnerability to mitigate the associated risks.