{"cve":"CVE-2026-68146","nvd":{"published":"2026-08-10T13:20:00.470","modified":"2026-08-23T13:16:34.080","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Add global mutex to serialize trace_parser access\n\nIn ftrace, the trace_parser structure is allocated and initialized when\na trace file is opened, and is subsequently used across write and release\nhandlers to parse user input.\n\nThe affected handler paths and their specific functions are:\n  - Open paths: ftrace_regex_open(), ftrace_graph_open()\n  - Write paths: ftrace_regex_write(), ftrace_graph_write()\n  - Release paths: ftrace_regex_release(), ftrace_graph_release()\n\nIf userspace opens a trace file descriptor and shares it across multiple\nthreads, concurrent write calls will race on the parser's internal state,\nspecifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted\ninput or undefined behavior.\n\nFix this by adding a global mutex, parser_lock, to serialize all access\nto trace_parser across write and release paths, preventing concurrent\ncorruption of parser state.","cvss_v4":null,"cvss_v3":null,"cwes":[],"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"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-68146","score":0.00184,"percentile":0.08047,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}