CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix UAF in selftest IOPF reporting IOMMUFD selftest TRIGGER_IOPF borrows an attach handle from group->pasid_array without synchronizing against PASID detach, then a concurrent iommu_report_device_fault() can dereference that borrowed handle's domain pointer after the detach erases the handle and frees the backing struct iommufd_attach_handle. TRIGGER_IOPF then dereferences the freed handle, causing a UAF. Fix by adding a iopf_rwsem in mock_dev to follow the expected design of a real driver. Hold its read side across the whole iommu_report_device_fault() call, and its write side around every path that attaches, detaches, or replaces a device domain. This can block new reports and drains in-flight reports before an old attach handle or the IOPF fault parameter can be removed. Also take the write side while registering a mock device, since it can invoke the mock driver's default-domain attach callback.
Засегнати продукти
- Linux Linux: ddee19971081b42615d62f4fdada21274708ed4d преди fd2e7ac94d6d813548b021473c3dddc30c8c07d1; ddee19971081b42615d62f4fdada21274708ed4d преди cab2895729516799384d48560e6fca105fb3f927; ddee19971081b42615d62f4fdada21274708ed4d преди e27e90bde68b2ab92e63ed19caad1ef57188bea0; ddee19971081b42615d62f4fdada21274708ed4d преди 8c07df7cdfcf52f1ff276c588612aabc6c6b8399
- Linux Linux: 6.11; преди 6.11; 6.12.112 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък
История
- 11 септември 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-89445
- https://nvd.nist.gov/vuln/detail/CVE-2026-89445
- https://git.kernel.org/stable/c/fd2e7ac94d6d813548b021473c3dddc30c8c07d1
- https://git.kernel.org/stable/c/cab2895729516799384d48560e6fca105fb3f927
- https://git.kernel.org/stable/c/e27e90bde68b2ab92e63ed19caad1ef57188bea0
- https://git.kernel.org/stable/c/8c07df7cdfcf52f1ff276c588612aabc6c6b8399