QSearchQSearch

CVE-2026-45945

8.8 HIGH

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix race condition during PASID entry replacement The I...

Published: 2026-05-27 · Last updated: 2026-06-16

Severity and scoring

CVSS
8.8 HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-362

Affected products

VendorProduct
linuxlinux_kernel

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix race condition during PASID entry replacement The Intel VT-d PASID table entry is 512 bits (64 bytes). When replacing an active PASID entry (e.g., during domain replacement), the current implementation calculates a new entry on the stack and copies it to the table using a single structure assignment. struct pasid_entry *pte, new_pte; pte = intel_pasid_get_entry(dev, pasid); pasid_pte_config_first_level(iommu, &new_pte, ...); *pte = new_pte; Because the hardware may fetch the 512-bit PASID entry in multiple 128-bit chunks, updating the entire entry while it is active (Present bit set) risks a "torn" read. In this scenario, the IOMMU hardware could observe an inconsistent state — partially new data and partially old data — leading to unpredictable behavior or spurious faults. Fix this by removing the unsafe "replace" helpers and following the "clear-then-update" flow, which ensures the Present bit is cleared and the required invalidation handshake is completed before the new configuration is applied.

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2026-46273 — In the Linux kernel, the following vulnerability has been resolved: ibmveth: Disable GSO for packets with small MSS Some physical adapt... (8.6 HIGH)
  • CVE-2026-46272 — In the Linux kernel, the following vulnerability has been resolved: coresight: tmc-etr: Fix race condition between sysfs and perf mode ... (4.7 MEDIUM)
  • CVE-2026-46271 — In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: do WoW offloads only on primary link In case of multi... (7.8 HIGH)
  • CVE-2026-46270 — In the Linux kernel, the following vulnerability has been resolved: power: supply: rt9455: Fix use-after-free in power_supply_changed() ... (8.4 HIGH)
  • CVE-2026-46269 — In the Linux kernel, the following vulnerability has been resolved: pinctrl: canaan: k230: Fix NULL pointer dereference when parsing dev... (5.5 MEDIUM)

Same CWE

  • CVE-2025-13036 — An authentication bypass security issue exists within FactoryTalk Historian Site Edition
  • CVE-2026-48708 — OliveTin gives access to predefined shell commands from a web interface (7.5 HIGH)
  • CVE-2026-54229 — A race condition was found in the abrt-dbus D-Bus service's ChownProblemDir method (7.0 HIGH)
  • CVE-2026-12022 — Race in Safe Browsing in Google Chrome on Mac prior to 149.0.7827.115 allowed a remote attacker who had compromised the renderer process ... (8.3 HIGH)
  • CVE-2026-46693 — ImageMagick is free and open-source software used for editing and manipulating digital images (4.1 MEDIUM)