Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.12, < 6.12.42 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321Patch
- https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adcePatch
- https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35Patch
- https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422Patch
FAQ
What is CVE-2025-38586?
CVE-2025-38586 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2025-38586?
CVE-2025-38586 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38586?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.