CVE-2025-39683 tracing: Limit access to parser->buffer when trace_get_user failed

In the Linux kernel, the following vulnerability has been resolved: tracing: Limit access to parser-buffer when tracegetuser failed When the length of the string written to setftracefilter exceeds FTRACEBUFFMAX, the following KASAN alarm will be triggered: BUG: KASAN: slab-out-of-bounds in...

CVE-2025-39683

CVE-2025-39683 (Linux kernel tracing vulnerability) The issue occurs when processing long strings in ftrace filters: trace_get_user may fail, but parser->buffer end is not zeroed, leading to a slab-out-of-bounds read in strsep/ftrace_process_regex and related release paths. The result is a loc...

PT-2025-36278

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.16.0 Description A flaw exists in the Linux kernel related to tracing functionality. Specifically, insufficient bounds checking when handling strings longer than FTRACE BUFF MAX within the ftrace process regex...