What’s Vulnerable › Vulnerabilities

CVE-2026-98004: iommu/riscv: Serialize command queue publishing

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/riscv: Serialize command queue publishing Serialize command queue publishing so software producer state advances only after a command is written and the hardware tail is updated. Wait for hardware consumption outside the queue lock when the command queue is full so other CPUs are not blocked behind a long poll.

Affected products

• Linux kernel: 6.13 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6d4c12ab9ab8db87411c863a54e0e97f9197afde
• https://git.kernel.org/stable/c/787405e9e7bdc53ea7e063fe7b855171b4bd0e91
• https://git.kernel.org/stable/c/ca58afa40946acd252a50fa4d4a86f15847a3d7d

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