CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of performance mask ioctls, specifically in the functions isst_if_get_perf_level_mask() and isst_if_get_base_freq_mask(), which do not validate user-provided indices before accessing the performance levels array. This oversight could lead to out-of-bounds reads, potentially exposing sensitive information or causing system instability. Linux system administrators and developers should prioritize this issue to ensure the integrity and security of their systems.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Validate level in perf mask ioctls isst_if_get_perf_level_mask() and isst_if_get_base_freq_mask() use the user-provided level as an index into perf_levels[] via _read_pp_level_info() and _read_bf_level_info(), but neither helper validates it first. The adjacent level-info helpers reject levels above max_level before reading the same per-level register block. Add the same bounds checks to the mask helpers, and reject disabled SST-PP levels in isst_if_get_perf_level_mask() to match isst_if_get_perf_level_info(). This prevents out-of-bounds reads from the per-level offset table on invalid ioctl input.