Description
A flaw was found in QEMU, in the virtio-scsi, virtio-blk, and virtio-crypto devices. The size for virtqueue_push as set in virtio_scsi_complete_req / virtio_blk_req_complete / virito_crypto_req_complete could be larger than the true size of the data which has been sent to guest. Once virtqueue_push() finally calls dma_memory_unmap to ummap the in_iov, it may call the address_space_write function to write back the data. Some uninitialized data may exist in the bounce.buffer, leading to an information leak.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | qemu | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 Advanced Virtualization | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
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 | No fix yet | — |
| Debian 13 | qemu | No fix yet | — |
| Debian 12 | qemu | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | qemu +1 | No fix yet | — |
| Ubuntu 26.04 LTS | qemu +1 | No fix yet | — |
| Ubuntu 25.10 | qemu | No fix yet | — |
| Ubuntu 24.04 LTS | qemu | No fix yet | — |
| Ubuntu 22.04 LTS | qemu | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 18.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 16.04 LTS | qemu | No fix yet | — |
| Ubuntu Pro 14.04 LTS | qemu | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | qemu | 8.2.7-15061.6.coco15sp6.1 | SUSE-SU-2024:4094-1, SUSE-SU-2024:3744-1 |
| SLES 15 SP6 | qemu-linux-user | 8.2.7-150600.3.20.1 | SUSE-SU-2024:4094-1 |
| SLES 15 SP5 | qemu | 7.1.0-150500.49.24.1 | SUSE-SU-2024:3948-1 |
| SLES 15 SP4 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SLES 15 SP3 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP4 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SLES for SAP 15 SP3 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
| SLE Micro 6.0 | qemu | 8.2.7-1.1 | SUSE-SU-2025:20076-1 |
| SLE Micro 5.5 | qemu | 7.1.0-150500.49.24.1 | SUSE-SU-2024:3948-1 |
| SLE Micro 5.4 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SLE Micro 5.3 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SLE Micro 5.2 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
| SLE Micro 5.1 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
| SLE HPC 15 SP4 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SLE HPC 15 SP3 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
| SUSE Manager Server 4.3 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SUSE Manager Proxy 4.3 | qemu | 6.2.0-150400.37.37.3 | SUSE-SU-2024:4304-1 |
| SUSE Enterprise Storage 7.1 | qemu | 5.2.0-150300.135.1 | SUSE-SU-2025:0692-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 9.1.0-2.1 | openSUSE-SU-2024:14411-1 |
| openSUSE Leap 15.6 | qemu +1 | 8.2.7-150600.3.20.1 | SUSE-SU-2024:4094-1 |
| openSUSE Leap 15.5 | qemu | 7.1.0-150500.49.24.1 | SUSE-SU-2024:3948-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.5 | qemu | 7.1.0-150500.49.24.1 | SUSE-SU-2024:3948-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qemu | 9.1.0-1 | — |
| Azure Linux 2 (CBL-Mariner) | qemu | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | qemu-img +10 | 31:7.2.0-42.el9 | ELSA-2026-500220 |
| Oracle Linux 8 | hivex +4 | 1.3.18-23.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libguestfs-winsupport | 8.10-1.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libnbd +4 | 1.6.0-6.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libtpms +1 | 0.9.1-3.20211126git1ff6fe1f43.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libvirt +29 | 9.0.0-16.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | nbdkit +18 | 1.24.0-5.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | perl-Sys-Virt | 8.0.0-1.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | qemu-img +11 | 15:7.2.0-41.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | seabios +2 | 1.16.0-4.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | supermin +1 | 5.2.1-2.0.1.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | swtpm +4 | 0.7.0-4.20211109gitb79fd91.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | virt-dib +22 | 1:1.44.0-9.0.3.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
| Oracle Linux 8 | virt-v2v +3 | 1:1.42.0-22.module+el8.10.0+90906+a4794619 | ELSA-2026-50337 |
Advisories 10
- WID-SEC-2024-2192 QEMU: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Aug 23, 2026
- ELSA-2026-500220 Moderate: qemu-kvm security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 19, 2026
- ELSA-2026-50337 Important: virt:kvm_utils3 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- SUSE-SU-2025:20076-1 Security update for qemu SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2024:3744-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4304-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4094-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3948-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14411-1 qemu-9.1.0-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:0692-1 Security update for qemu SUSE / openSUSE Security Updates · May 2, 2025