Description
A flaw was found in libvirt. During storage volume clone or convert operations, newly created volume images were temporarily world-readable. This was caused by the `qemu-img` utility running with overly permissive file creation settings, allowing any local user to read the full guest disk contents. This vulnerability could lead to sensitive information disclosure from guest virtual machines.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 9 | — | — |
| Red Hat | Red Hat Enterprise Linux for NVIDIA 26 | — | — |
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 | libvirt | 12.6.0-1 | — |
| Debian 13 | libvirt | 11.3.0-3+deb13u3 | — |
| Debian 12 | libvirt | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | libvirt | 12.0.0-1ubuntu5.3 | USN-8652-1 |
| Ubuntu 26.04 LTS | libvirt-hwe | 12.0.0-1ubuntu5.5 | USN-8833-1 |
| Ubuntu 24.04 LTS | libvirt | 10.0.0-2ubuntu8.16 | USN-8652-1 |
| Ubuntu 22.04 LTS | libvirt | 8.0.0-1ubuntu7.19 | USN-8652-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | libvirt | 6.0.0-0ubuntu8.20+esm1 | USN-8652-1 |
| Ubuntu Pro 18.04 LTS | libvirt | 4.0.0-1ubuntu8.21+esm1 | USN-8652-1 |
| Ubuntu Pro 16.04 LTS | libvirt | 1.3.1-1ubuntu10.31+esm1 | USN-8652-1 |
| Ubuntu Pro 14.04 LTS | libvirt | 1.2.2-0ubuntu13.1.28+esm2 | USN-8652-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libvirt | 11.0.0-150700.4.27.1 | SUSE-SU-2026:3939-1 |
| SLES 15 SP6 | libvirt | 10.0.0-150600.8.18.1 | SUSE-SU-2026:4010-1 |
| SLES 15 SP5 | libvirt | 9.0.0-150500.6.29.1 | SUSE-SU-2026:4009-1 |
| SLES 15 SP4 | libvirt | 8.0.0-150400.7.17.1 | SUSE-SU-2026:4004-1 |
| SLES 12 SP5 | libvirt | 5.1.0-13.48.1 | SUSE-SU-2026:4141-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libvirt | 11.4.0-160000.5.1 | SUSE-SU-2026:23603-1 |
| SLES for SAP 15 SP6 | libvirt | 10.0.0-150600.8.18.1 | SUSE-SU-2026:4010-1 |
| SLES for SAP 15 SP5 | libvirt | 9.0.0-150500.6.29.1 | SUSE-SU-2026:4009-1 |
| SLES for SAP 15 SP4 | libvirt | 8.0.0-150400.7.17.1 | SUSE-SU-2026:4004-1 |
| SLES 16.0 | libvirt | 11.4.0-160000.5.1 | SUSE-SU-2026:23603-1 |
| SLE Micro 6.2 | libvirt | 11.4.0-160000.5.1 | SUSE-SU-2026:23460-1 |
| SLE Micro 6.1 | libvirt | 10.0.0-slfo.1.1_3.1 | SUSE-SU-2026:23515-1 |
| SLE Micro 6.0 | libvirt | 10.0.0-5.1 | SUSE-SU-2026:23445-1 |
| SLE Micro 5.5 | libvirt | 9.0.0-150500.6.29.1 | SUSE-SU-2026:4009-1 |
| SLE Micro 5.4 | libvirt | 8.0.0-150400.7.17.1 | SUSE-SU-2026:4004-1 |
| SLE Micro 5.3 | libvirt | 8.0.0-150400.7.17.1 | SUSE-SU-2026:4004-1 |
| SLE HPC 15 SP5 | libvirt | 9.0.0-150500.6.29.1 | SUSE-SU-2026:4009-1 |
| SLE HPC 15 SP4 | libvirt | 8.0.0-150400.7.17.1 | SUSE-SU-2026:4004-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libvirt | 12.6.0-1.1 | openSUSE-SU-2026:11455-1 |
| openSUSE Leap 16.0 | libvirt | 11.4.0-160000.5.1 | openSUSE-SU-2026:21738-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libvirt +30 | 4.5.0-36.amzn2.3.3 | ALAS2-2026-3873 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libvirt | 11.9.0-1 | — |
Advisories 15
- WID-SEC-2026-2724 libvirt: Mehrere Schwachstellen ermöglichen BSI CERT-Bund (WID) · Oct 6, 2026
- SUSE-SU-2026:23603-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:4141-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 28, 2026
- USN-8833-1 libvirt-hwe vulnerabilities Ubuntu Security Notices (USN) · Sep 28, 2026
- SUSE-SU-2026:23515-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 15, 2026
- SUSE-SU-2026:23460-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 14, 2026
- SUSE-SU-2026:23445-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 14, 2026
- SUSE-SU-2026:4009-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:4010-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:4004-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 13, 2026
- SUSE-SU-2026:3939-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 10, 2026
- openSUSE-SU-2026:21738-1 Security update for libvirt SUSE / openSUSE Security Updates · Sep 9, 2026
- ALAS2-2026-3873 Important: libvirt security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 31, 2026
- USN-8652-1 libvirt vulnerabilities Ubuntu Security Notices (USN) · Aug 20, 2026
- openSUSE-SU-2026:11455-1 libvirt-12.6.0-1.1 on GA media SUSE / openSUSE Security Updates · Aug 6, 2026
References
- https://access.redhat.com/security/cve/CVE-2026-63623 vdb-entry
- RHBZ#2513066 issue-tracking