What’s Vulnerable › Vulnerabilities

CVE-2026-93103: RDMA/hfi1: Preserve unit 0 on allocation failure

• 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: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Preserve unit 0 on allocation failure hfi1_free_devdata() assumes that the device was inserted into the unit table and unconditionally erases dd->unit. If xa_alloc_irq() fails, the zero-initialized unit remains zero, so full cleanup can remove an unrelated device from index 0. Release only the rdmavt allocation and return immediately while the unit table has not acquired the device.

Affected products

• Linux kernel: 5.2 — 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/0feb29d434e6cc0ebefec4f77be014c85ad751b0
• https://git.kernel.org/stable/c/2e3809ad8911f5d5581b3f046bd628417bface76
• https://git.kernel.org/stable/c/3d0e5252b8d0345ef494763ca31e3ddd666e02cb
• https://git.kernel.org/stable/c/3f1e196eb66b8cd3882e373794d6cea46f150a20
• https://git.kernel.org/stable/c/4204f5c0312ba136181a6e148ffa0bfaf95a4cc1
• https://git.kernel.org/stable/c/4ff9d58d34758e9633078b37e8d5289b513ff80e
• https://git.kernel.org/stable/c/852637d3ee56aed8ea3ee8948eda21eca406c051
• https://git.kernel.org/stable/c/fd4d3ad5f244a867166d1e2da7ece3d82878ec81

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