CVE-2026-74517

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: Cancel delayed I/O APIC EOI handling before destroying vCPUs

Cancel (and flush) the I/O APIC's delayed EOI handling work during the

"pre VM destroy" phase, before vCPUs are destroyed, as processing the EOI

broadcast will inject another IRQ if the line is asserted, i.e. will try

to deliver an IRQ to the target vCPU(s). Canceling the work after vCPUs

are destroyed leads to UAF if the delayed work is processed after vCPUs are

destroyed.

BUG: KASAN: slab-use-after-free in __kvm_irq_delivery_to_apic_fast+0x9bf/0xa20 arch/x86/kvm/lapic.c:1250

Read of size 8 at addr ffff8880499abea0 by task kworker/1:2/1218

CPU: 1 UID: 0 PID: 1218 Comm: kworker/1:2 Not tainted 7.1.0-rc7 #5 PREEMPT(lazy)

Hardware name: QEMU Ubuntu 25.10 PC v2 (i440FX + PIIX, + 10.1 machine, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014

Workqueue: events kvm_ioapic_eoi_inject_work

Call Trace:

<TASK>

__dump_stack lib/dump_stack.c

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References