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_…
Impact
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.
An attacker can exploit this with local access to the system, with a regular user account, without any action by a user. If it succeeds: high risk of data being read, high risk of data or systems being changed, high risk of outages.
Affected products · Linux
| Product | Affected versions |
|---|---|
| Linux | from 32dc0042528d385d83bf458e4cf3a49c5110afea before 92b69f6db640dadc0851762ee2e12db99f083cad from 32dc0042528d385d83bf458e4cf3a49c5110afea before d6d991afe775ab7fcf89523a2502b7ca3be56ffd from 32dc0042528d385d83bf458e4cf3a49c5110afea before 1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa Versions 6.16, patch: 6.18.60, patch: 7.3.1 |
References
- NVD record
- CVE.org record
- GitHub advisory
- https://git.kernel.org/stable/c/92b69f6db640dadc0851762ee2e12db99f083cad
- https://git.kernel.org/stable/c/d6d991afe775ab7fcf89523a2502b7ca3be56ffd
- https://git.kernel.org/stable/c/1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa
- https://github.com/advisories/GHSA-w7jm-33hw-fpp2
- https://nvd.nist.gov/vuln/detail/CVE-2026-99237
- https://git.kernel.org/stable/c/5a6bd62f09147b49b31fd19d4eba122cb5f941a1