Description
QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256. This stops QEMU and the guest immediately.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qemu | 1:8.1.1+ds-1 | — |
| Debian 13 | qemu | 1:8.1.1+ds-1 | — |
| Debian 12 | qemu | 1:7.2+dfsg-7+deb12u3 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | qemu-img +19 | 17:8.2.0-11.el9_4 | RHSA-2024:2135 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | qemu-img +19 | 17:8.2.0-11.el9_4 | ALSA-2024:2135 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | qemu-kvm | 7:8.2.0-11.el9_4 | RLSA-2024:2135 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.5 | qemu | 7.1.0-150500.49.30.1 | SUSE-SU-2025:0516-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 8.1.2-1.1 | openSUSE-SU-2024:13364-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qemu | 8.2.0-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | qemu-img +18 | 17:8.2.0-11.el9_4 | ELSA-2024-12407, ELSA-2024-2135 |
| Oracle Linux 9 | qemu-virtiofsd +2 | 30:7.2.0-11.el9 | ELSA-2024-12407 |
| Oracle Linux 8 | hivex +4 | 1.3.18-23.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libguestfs-winsupport | 8.6-1.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libnbd +4 | 1.6.0-5.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libtpms +1 | 0.9.1-0.20211126git1ff6fe1f43.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libvirt +28 | 7.10.0-4.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | libvirt-client-qemu | 9.0.0-5.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12276 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | nbdkit +18 | 1.24.0-4.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | perl-Sys-Virt | 6.0.0-1.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | qemu-img +10 | 15:6.1.1-9.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | seabios +2 | 1.15.0-2.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.9.0+90173+a3f3e83a | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | supermin +1 | 5.2.1-1.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | swtpm +4 | 0.7.0-3.20211109gitb79fd91.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | virt-dib +22 | 1:1.44.0-5.0.1.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
| Oracle Linux 8 | virt-v2v +3 | 1:1.42.0-19.0.1.module+el8.10.0+90374+95a91213 | ELSA-2024-12605, ELSA-2024-12276 |
Advisories 10
- ALSA-2024:2135 Moderate: qemu-kvm security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:2135 Red Hat Security Advisory: qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RLSA-2024:2135 Moderate: qemu-kvm security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:13364-1 qemu-8.1.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0516-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2302 QEMU: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Apr 10, 2025
- ELSA-2024-12605 Important: virt:kvm_utils2 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 2, 2024
- ELSA-2024-12407 Moderate: qemu-kvm security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 3, 2024
- ELSA-2024-2135 Moderate: qemu-kvm security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 2, 2024
- ELSA-2024-12276 Moderate: virt:kvm_utils3 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 10, 2024