CVE-2026-89447
Last modified
CVE-2026-89447 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: iommufd: Avoid locking internal accesses during unmap iommufd_access_notify_unmap() skips internal accesses because they do not have an external unmap callback to invoke. However, the current test calls iommufd_lock_obj() before checking whether the access is internal. If iommufd_lock_obj() succeeds, the loop then sees the internal access and continues, bypassing the matching iommufd_put_object() used by the normal unmap path.
Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Avoid locking internal accesses during unmap iommufd_access_notify_unmap() skips internal accesses because they do not have an external unmap callback to invoke. However, the current test calls iommufd_lock_obj() before checking whether the access is internal. If iommufd_lock_obj() succeeds, the loop then sees the internal access and continues, bypassing the matching iommufd_put_object() used by the normal unmap path. This leaks the object reference taken by iommufd_lock_obj(). Check for internal accesses first so skipped entries are never locked.
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 436189ee4bb2c7c993b945d68570dd38c3e4349e; >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 50a66a63d1c841ae6b28a4551f642c1bba4c9529; >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 0dbcdf4473a614adbd732d567c9b39ac0e040e0c |
| Linux | Linux | 6.17 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-89447?
How severe is CVE-2026-89447?
How do I fix CVE-2026-89447?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-89441In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-89442In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-89443In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2026-89444In the Linux kernel, the following vulnerability has been re…
- CVE-2026-89445In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-89446In the Linux kernel, the following vulnerability has been re…
- CVE-2026-89448In the Linux kernel, the following vulnerability has been re…9.3
- CVE-2026-89449In the Linux kernel, the following vulnerability has been re…
- CVE-2026-8945Sandbox escape in Firefox and Firefox Focus for Android. Thi…7.5
- CVE-2026-89450In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-89451In the Linux kernel, the following vulnerability has been re…
- CVE-2026-89452In the Linux kernel, the following vulnerability has been re…8.4
Are you affected by CVE-2026-89447?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST