What’s Vulnerable › Vulnerabilities

CVE-2026-72283: KVM: x86: Nullify irqfd->producer if updating IRTE for bypass fails

• Severity: high (CVSS 8.8 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: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Nullify irqfd->producer if updating IRTE for bypass fails Nullify irqfd->producer if updating the IRTE for bypass fails, as leaving a dangling pointer will result in a use-after-free if the irqfd is reachable through KVM's routing, but the producer is freed separately. E.g. for VFIO PCI, the producer is embedded in struct "vfio_pci_irq_ctx" and freed when the vector is disabled, which can happen independent of routing updates. [sean: drop PPC change, massage changelog]

Affected products

• Linux kernel: 6.17 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/d1379888cc4230bac647ec24ab83306afbd03e88
• https://git.kernel.org/stable/c/d5560b6569cd05ba72c6b33427fbabc6ec46b8cf
• https://git.kernel.org/stable/c/ed446e8aa894883c08892cfee69782fdf8f6c3ca

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