CVE-2026-99238
In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when updating modules in persistent instances trace_module_r…
Impact
In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when updating modules in persistent instances trace_module_record() walks ftrace_trace_arrays from the module notifier without trace_types_lock. A concurrent rmdir of an instance removes it from the list and frees it under that lock, so a module load or unload can walk into a freed trace_array.
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 5f3719f697c3fdfae5cd6805f10ac7a04b0f4e43 before 57408eac99b0d8a005796346d317d31f0ca4e07a from 5f3719f697c3fdfae5cd6805f10ac7a04b0f4e43 before dab2bd4d67ad5eaa95019a9511f8d379401b5021 from 5f3719f697c3fdfae5cd6805f10ac7a04b0f4e43 before 244c442f54601a24c86ad90572bf36fc3df41c5e Versions 6.15, patch: 7.2.14, patch: 0 |
References
- NVD record
- CVE.org record
- GitHub advisory
- https://git.kernel.org/stable/c/57408eac99b0d8a005796346d317d31f0ca4e07a
- https://git.kernel.org/stable/c/dab2bd4d67ad5eaa95019a9511f8d379401b5021
- https://git.kernel.org/stable/c/244c442f54601a24c86ad90572bf36fc3df41c5e
- https://github.com/advisories/GHSA-x8hw-cmw2-gvx9
- https://nvd.nist.gov/vuln/detail/CVE-2026-99238
- https://git.kernel.org/stable/c/66877a312ae3c2c3d849e82e882f642ffd4ec3e2