Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when a trace file is opened, and is subsequently used across write and release handlers to parse user input. The affected handler paths and their specific functions are: - Open paths: ftrace_regex_open(), ftrace_graph_open() - Write paths: ftrace_regex_write(), ftrace_graph_write() - Release paths: ftrace_regex_release(), ftrace_graph_release() If userspace opens a trace file descriptor and shares it across multiple threads, concurrent write calls will race on the parser's internal state, specifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted input or undefined behavior. Fix this by adding a global mutex, parser_lock, to serialize all access to trace_parser across write and release paths, preventing concurrent corruption of parser state.
References
- https://git.kernel.org/stable/c/1474fe4453505b6be720b5bb94be1c927de3314a
- https://git.kernel.org/stable/c/3d0dd138a06c782f8b755cd1b6f9909494514ce1
- https://git.kernel.org/stable/c/65bf73bee1a4f3722208ae46afc0fa5de76b9a0a
- https://git.kernel.org/stable/c/7720b63bcef3f54c7fe288774b720a227d54a306
- https://git.kernel.org/stable/c/90be137813e1a5bdfd671e40fe28004fb959d3e4
- https://git.kernel.org/stable/c/a29bc20ea5f0cb79c6287f2c6182c5eeb8e6c01f
- https://git.kernel.org/stable/c/db76744d588086695371ecdd982694395628ba48
- https://git.kernel.org/stable/c/e807c9193d9493c7a0d039158ebb955050a76df1
FAQ
What is CVE-2026-68146?
CVE-2026-68146 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when ...
How severe is CVE-2026-68146?
CVSS scoring is not yet available for CVE-2026-68146. Check NVD for updates.
Is there a patch for CVE-2026-68146?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.