Riskcovery

CVE-2026-72283

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

State
Published
Severity
8.8 High
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

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]

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 to before d1379888cc4230bac647ec24ab83306afbd03e88Affected
  • 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 to before d5560b6569cd05ba72c6b33427fbabc6ec46b8cfAffected
  • 77e1b8332d1d7aa786f7515e9bd4055def6a1e06 to before ed446e8aa894883c08892cfee69782fdf8f6c3caAffected
LinuxLinux
  • 6.17Affected
  • before 6.17Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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