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CVE-2026-90007: scsi: pm8001: Use rollback index when freeing MSI-X vectors

• 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: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: pm8001: Use rollback index when freeing MSI-X vectors pm8001_request_msix() unwinds previously registered handlers with free_irq() when request_irq() fails. The rollback loop uses the failing index i for every iteration instead of the already registered vector index j. That passes the wrong IRQ/dev_id pair to free_irq() and leaves the earlier handlers installed. Use j for both pci_irq_vector() and the matching irq_vector entry in the rollback loop.

Affected products

• Linux kernel: 4.11 — 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/0205db768570f9a46b20912afa581a0c7a63d8b7
• https://git.kernel.org/stable/c/2853ce9c88e0e6dd575f95f28b3a8c2b27164115
• https://git.kernel.org/stable/c/3f92a64545165bdbb36dee8fa35626b295463313
• https://git.kernel.org/stable/c/a980dec7c69990e4f119bcf6a2ea093d1c4975e8
• https://git.kernel.org/stable/c/dd817463c9b42a3a9e23d15b86c6c77a6cfb809d
• https://git.kernel.org/stable/c/e20b16aa3b49f9db5510940740255a987e6f2a6f
• https://git.kernel.org/stable/c/f39e3ca1f688d7c08954a0794e9bf1e279c83b15
• https://git.kernel.org/stable/c/fb22a8d2f3ac6665cc8bee197096b6675cac1a9f

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