CVE-2023-54303

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_perf_event_output The nesting protection in bpf_perf_event_output relies on disabled preemption, which is guaranteed for kprobes and tracepoints. However bpf_perf_event_output can be also called from uprobes context through bpf_prog_run_array_sleepable function which disables migration, but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle page fault for address: ffffffff82be3eea ... Call Trace: ? __die+0x1f/0x70 ? page_fault_oops+0x176/0x4d0 ? exc_page_fault+0x132/0x230 ? asm_exc_page_fault+0x22/0x30 ? perf_output_sample+0x12b/0x910 ? perf_event_output+0xd0/0x1d0 ? bpf_perf_event_output+0x162/0x1d0 ? bpf_prog_c6271286d9a4c938_krava1+0x76/0x87 ? __uprobe_perf_func+0x12b/0x540 ? uprobe_dispatcher+0x2c4/0x430 ? uprobe_notify_resume+0x2da/0xce0 ? atomic_notifier_call_chain+0x7b/0x110 ? exit_to_user_mode_prepare+0x13e/0x290 ? irqentry_exit_to_user_mode+0x5/0x30 ? asm_exc_int3+0x35/0x40 Fixing this by disabling preemption in bpf_perf_event_output.

The following products are affected by CVE-2023-54303 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2023-54303.

URL	Resource
https://git.kernel.org/stable/c/3654ed5daf492463c3faa434c7000d45c2da2ace
https://git.kernel.org/stable/c/a0ac32cf61e5a76e2429e486925a52ee41dd75e3
https://git.kernel.org/stable/c/f2c67a3e60d1071b65848efaa8c3b66c363dd025
https://lore.kernel.org/linux-cve-announce/2025123033-CVE-2023-54303-0e92@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-54303
https://www.cve.org/CVERecord?id=CVE-2023-54303