CVE-2026-89447: Linux

Описание

Оригинално описание

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.

Засегнати продукти

• Linux Linux: 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 преди 436189ee4bb2c7c993b945d68570dd38c3e4349e; 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 преди 50a66a63d1c841ae6b28a4551f642c1bba4c9529; 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 преди 0dbcdf4473a614adbd732d567c9b39ac0e040e0c
• Linux Linux: 6.17; преди 6.17; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89447
• https://nvd.nist.gov/vuln/detail/CVE-2026-89447
• https://git.kernel.org/stable/c/436189ee4bb2c7c993b945d68570dd38c3e4349e
• https://git.kernel.org/stable/c/50a66a63d1c841ae6b28a4551f642c1bba4c9529
• https://git.kernel.org/stable/c/0dbcdf4473a614adbd732d567c9b39ac0e040e0c