Bug 2432668 (CVE-2026-23013)

Summary: CVE-2026-23013 kernel: net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-25 15:02:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: octeon_ep_vf: fix free_irq dev_id mismatch in IRQ rollback

octep_vf_request_irqs() requests MSI-X queue IRQs with dev_id set to
ioq_vector. If request_irq() fails part-way, the rollback loop calls
free_irq() with dev_id set to 'oct', which does not match the original
dev_id and may leave the irqaction registered.

This can keep IRQ handlers alive while ioq_vector is later freed during
unwind/teardown, leading to a use-after-free or crash when an interrupt
fires.

Fix the error path to free IRQs with the same ioq_vector dev_id used
during request_irq().
Comment 1 Alexander B 2026-01-26 10:22:56 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012538-CVE-2026-23013-303c@gregkh/T