Vulnerability in Linux
CVE-2026-99237
In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when resetting last boot data from readers update_last_data_if_empty() is called from tracing_open() with O_TRUNC, tracing_read_pipe() and tracing_buffers_read() without trace_types_lock. Two readers can both pass the LAST_BOOT test and free module_delta twice, and a module notifier can update module_delta while it is being freed. Take trace_types_lock in those paths and keep the callers that already hold it on an unlocked variant.
Published .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Linux — versions 6.16
References
Frequently asked questions
- What is CVE-2026-99237?
- CVE-2026-99237 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-11-02.
- How severe is CVE-2026-99237?
- High severity. CVSS v3 base score is 7.8 out of 10.