KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.19 % · percentile 9 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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 ]---
References
- https://git.kernel.org/stable/c/038b9ce6fafda1babd1e33d52cbc6039747a6d87
- https://git.kernel.org/stable/c/8e9f7a95279bf608cf4c331ed89612e28c04564f
- https://git.kernel.org/stable/c/ebd7845ca0471d251a1cb48d84eb165aff5b7123
- https://git.kernel.org/stable/c/97542f15dc4cf6cd3fdc035e482dca54246ddf48
- https://git.kernel.org/stable/c/32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e
- https://git.kernel.org/stable/c/9285e4070df2c40585c3d7ec9571faa7a2b97e17
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | Linux |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-59183
- GCVE · GCVE-0-2026-72284
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1231 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < 038b9ce6fafda1babd1e33d52cbc6039747a6d87 ; affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < 8e9f7a95279bf608cf4c331ed89612e28c04564f ; affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < ebd7845ca0471d251a1cb48d84eb165aff5b7123 ; affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < 97542f15dc4cf6cd3fdc035e482dca54246ddf48 ; affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < 32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e ; affected ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb < 9285e4070df2c40585c3d7ec9571faa7a2b97e17 |
| Linux · Linux | affected 3.6 ; unaffected 0 < 3.6 ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* ; unaffected 6.12.97 ≤ 6.12.* ; unaffected 6.18.40 ≤ 6.18.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |