CVE-2026-68146
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…
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
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.
- CVSS
- Not yet scored
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.