What’s Vulnerable › Vulnerabilities

CVE-2026-90388: iommu/dma: Check atomic pool allocation result directly

• Severity: high (CVSS 7.8 v3.1)
• 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: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/dma: Check atomic pool allocation result directly The non-blocking, non-coherent allocation path uses dma_alloc_from_pool(), which returns the allocated page and fills cpu_addr only on success. Do not rely on cpu_addr to detect allocation failure in this path. Check the returned page directly before using it for the IOMMU mapping.

Affected products

• Linux kernel: from 5.8.6 before 5.9; 5.9 — fixed in 5.9, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 5.9, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/06dffc96693083dda3412311406e558cf27f1574
• https://git.kernel.org/stable/c/8c486293ddd0af60991408149fc3e964ea888dc4
• https://git.kernel.org/stable/c/a4ace31d732b657d774e31fb444c0c27d42c78e5
• https://git.kernel.org/stable/c/ac9cd0a669b8be5d178dbd471b0d68039dac58b5
• https://git.kernel.org/stable/c/af95a0ebc0a0db0762be75f51eadf770bad01aaa
• https://git.kernel.org/stable/c/d56c3f955b21e5764c1497e295a5b5d0b3a40470
• https://git.kernel.org/stable/c/db46cb9da83a507d86d2bb080bdb09c865da3d0a
• https://git.kernel.org/stable/c/fb0b39287ba894dbdfac2901c51788b63f5c2291

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