CVE-2025-38586

In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix fp initialization for exception boundary In the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPF program, find_used_callee_regs() is not called because for a program acting as exception boundary, all callee saved registers are saved. find_used_callee_regs() sets `ctx->fp_used = true;` when it sees FP being used in any of the instructions. For programs acting as exception boundary, ctx->fp_used remains false even if frame pointer is used by the program and therefore, FP is not set-up for such programs in the prologue. This can cause the kernel to crash due to a pagefault. Fix it by setting ctx->fp_used = true for exception boundary programs as fp is always saved in such programs.

The following products are affected by CVE-2025-38586 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-38586.

URL	Resource
https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321
https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adce
https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35
https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422
https://lore.kernel.org/linux-cve-announce/2025081915-CVE-2025-38586-789b@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-38586
https://www.cve.org/CVERecord?id=CVE-2025-38586