🔴 高危 | CVE-2026-52952 — In the Linux kernel, the following vulnerability has be
🔴 《高危安全漏洞：CVE-2026-52952》
CVSS 评分: 高危（8.8） CVE ID: CVE-2026-52952
漏洞描述
In the Linux kernel, the following vulnerability has been resolved:
iommu: Fix WARN_ON in __iommu_group_set_domain_nofail() due to reset
In __iommu_group_set_domain_internal(), concurrent domain attachments are
rejected when any device in the group is recovering. This is necessary to
fence concurrent attachments to a multi-device group where devices might
share the same RID due to PCI DMA alias quirks, but triggers the WARN_ON in
__iommu_group_set_domain_nofail().
Other IOMMU_SET_DOMAIN_MUST_SUCCEED callers in detach/teardown paths, such
as __iommu_group_set_core_domain and __iommu_release_dma_ownership, should
not be rejected, as the domain would be freed anyway in these nofail paths
while group->domain is still pointing to it. So pci_dev_reset_iommu_done()
could trigger a UAF when re-attaching group->domain.
Honor the IOMMU_SET_DOMAIN_MUST_SUCCEED flag, allowing the callers through
the group->recovery_cnt fence, so as to update the group->domain pointer.
Instead add a gdev->blocked check in the device iteration loop, to prevent
any concurrent per-device detachment.
| 字段 | 值 |
|---|---|
| CVE ID | CVE-2026-52952 |
| CVSS 评分 | 8.8 |
| 严重程度 | 高危 |
| 发布时间 | 2026-06-24 |
| 状态 | Received |
数据来源: NVD | 获取时间: 2026-06-28 18:14