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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-72284

KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs Ignore KVM's internal "service pending PV EOI" request if the vCPU has disabled PV EOIs since the request was made. Asserting that PV EOIs are enabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e. if pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables PV EOIs. kernel BUG at arch/x86/kvm/lapic.c:3338! Oops: invalid opcode: 0000 [#1] SMP CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 RIP: 0010:kvm_lapic_sync_from_vapic+0x12b/0x140 [kvm] Call Trace: <TASK> kvm_arch_vcpu_ioctl_run+0x1075/0x1c30 [kvm] kvm_vcpu_ioctl+0x2d5/0x980 [kvm] __x64_sys_ioctl+0x8a/0xd0 do_syscall_64+0xb5/0xb40 entry_SYSCALL_64_after_hwframe+0x4b/0x53 </TASK> Modules linked in: kvm_intel kvm irqbypass ---[ end trace 0000000000000000 ]---

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < 038b9ce6fafda1babd1e33d52cbc6039747a6d87affected
  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < 8e9f7a95279bf608cf4c331ed89612e28c04564faffected
  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < ebd7845ca0471d251a1cb48d84eb165aff5b7123affected
  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < 97542f15dc4cf6cd3fdc035e482dca54246ddf48affected
  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < 32bdca80aa81c2cb906f50a88b220ce1ecdc5e6eaffected
  • ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb to < 9285e4070df2c40585c3d7ec9571faa7a2b97e17affected

Linux Linux

Default version status: affected

  • 3.6affected
  • 0 to < 3.6unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References