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.
References
| Link | Resource |
|---|---|
| https://git.kernel.org/stable/c/5474e6e17a262db45c60575c73f70210f5c7001f | Patch |
| https://git.kernel.org/stable/c/8fc289e809f3eb7e36cadc4684ab6fad747a5a93 | Patch |
| https://access.redhat.com/security/cve/CVE-2026-52952 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2492422 | Third Party Advisory |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52952.json | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
14 Jul 2026, 16:51
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
|
| CWE | CWE-617 | |
| References | () https://git.kernel.org/stable/c/5474e6e17a262db45c60575c73f70210f5c7001f - Patch | |
| References | () https://git.kernel.org/stable/c/8fc289e809f3eb7e36cadc4684ab6fad747a5a93 - Patch | |
| References | () https://access.redhat.com/security/cve/CVE-2026-52952 - Third Party Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2492422 - Third Party Advisory | |
| References | () https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-52952.json - Third Party Advisory |
30 Jun 2026, 03:20
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
|
| CWE | CWE-825 |
28 Jun 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.8 |
24 Jun 2026, 17:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-24 17:17
Updated : 2026-07-15 01:16
NVD link : CVE-2026-52952
Mitre link : CVE-2026-52952
CVE.ORG link : CVE-2026-52952
JSON object : View
Products Affected
linux
- linux_kernel