CVE-2025-39990

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Check the helper function is valid in get_helper_proto<br /> <br /> kernel test robot reported verifier bug [1] where the helper func<br /> pointer could be NULL due to disabled config option.<br /> <br /> As Alexei suggested we could check on that in get_helper_proto<br /> directly. Marking tail_call helper func with BPF_PTR_POISON,<br /> because it is unused by design.<br /> <br /> [1] https://lore.kernel.org/oe-lkp/202507160818.68358831-lkp@intel.com