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Linux KernelOperating system · Linux

CVE-2026-52952

HIGH · 8.8 CVSS v3.1 Developing Published 2026-06-24
Fix available
A fix is available. Upgrade to 7.0.10 or later.
See remediation →
90/100
Remediation priority · Urgent
Zero-click 8 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · low confidence
Developing — this CVE was published recently and its authoritative NVD entry is still being established, so we're holding a technical summary until the source data settles rather than publish something unreliable. Re-checking after 2026-08-08.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 7.0, < 7.0.10= 7.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 7.0.10 or later
Fixed in 7.0.10
Recommended fix Moderate confidence

Linux Kernel 7.0.10 or later (or any stable release > 7.1)

  1. 1. Identify the current kernel version using `uname -r` or `cat /proc/version`
  2. 2. Check if the running kernel version is affected: versions >= 7.0 and < 7.0.10, or exactly 7.1
  3. 3. Update the system package manager to check for available kernel updates (e.g., `apt update` for Debian/Ubuntu, `yum check-update` for RHEL/CentOS, or `dnf check-update` for Fedora)
  4. 4. Install the updated kernel package: On Debian/Ubuntu run `apt-get install linux-image-*`, on RHEL/CentOS run `yum update kernel`, or on Fedora run `dnf update kernel`
  5. 5. Reboot the system to load the new kernel: `systemctl reboot`
  6. 6. After reboot, verify the new kernel version is running with `uname -r` and confirm it is version 7.0.10 or later, or version > 7.1
Caveat Kernel upgrades may require system reboots and could introduce compatibility changes with third-party kernel modules; ensure dependent modules are rebuilt for the new kernel version

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-52952 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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