Description
A flaw was found in the QEMU virtio-fs shared file system daemon (virtiofsd) implementation. This flaw is strictly related to CVE-2018-13405. A local guest user can create files in the directories shared by virtio-fs with unintended group ownership in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of the group. This could allow a malicious unprivileged user inside the guest to gain access to resources accessible to the root group, potentially escalating their privileges within the guest. A malicious local user in the host might also leverage this unexpected executable file created by the guest to escalate their privileges on the host system.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | QEMU/virtiofsd | Fixed in qemu v6.2.0-7 | — |
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 | 1:7.0+dfsg-1 | — |
| Debian 13 | qemu | 1:7.0+dfsg-1 | — |
| Debian 12 | qemu | 1:7.0+dfsg-1 | — |
| Debian 11 | qemu | 1:5.2+dfsg-11+deb11u2 | DSA-5133-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | qemu | 1:6.2+dfsg-2ubuntu6.2 | USN-5489-1 |
| Ubuntu 20.04 LTS | qemu | 1:4.2-3ubuntu6.21 | USN-5489-1, USN-5307-1 |
| Ubuntu 18.04 LTS | qemu | 1:2.11+dfsg-1ubuntu7.39 | USN-5489-1, USN-5307-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | SLOF | 20191022-3.git899d9883.module+el8.2.0+5449+efc036dd | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | hivex +6 | 1.3.18-20.module+el8.2.0+5588+63a201c3 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libguestfs-winsupport | 8.2-1.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libiscsi +2 | 1.18.0-8.module+el8.1.0+4066+0f1aadab | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libnbd +5 | 1.2.2-1.module+el8.2.0+5644+32ac38d4 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libnbd-bash-completion | 1.6.0-5.module+el8.4.0+14155+dec4a5c7 | RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libtpms +1 | 0.7.0-1.20191018gitdc116933b7.module+el8.2.0+4793+b09dd2fb | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libvirt +28 | 6.0.0-25.6.module+el8.2.1+12457+868e9540 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libvirt-dbus | 1.3.0-2.module+el8.2.0+4793+b09dd2fb | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libvirt-python +1 | 6.0.0-1.module+el8.2.0+5453+31b2b136 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | libvirt-wireshark | 7.0.0-14.6.module+el8.4.0+13801+378af433 | RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | nbdkit +13 | 1.16.2-4.module+el8.2.1+6710+effcb1df | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | nbdkit-nbd-plugin +4 | 1.24.0-1.module+el8.4.0+9341+96cf2672 | RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | netcf +2 | 0.2.8-12.module+el8.1.0+4066+0f1aadab | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | perl-Sys-Virt | 6.0.0-1.module+el8.2.0+5488+267def79 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | python-pyvmomi +1 | 6.7.1-7.module+el8.2.0+4793+b09dd2fb | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | qemu-img +10 | 15:4.2.0-29.module+el8.2.1+14195+13a89360.11 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | qemu-kiwi +3 | 15:5.2.0-16.module+el8.4.0+14193+48a3f5f5.15 | RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | qemu-kvm-hw-usbredir | 15:6.0.0-33.module+el8.5.0+14188+8c5ecfdd.3 | RHSA-2022:0949 |
| RHEL 8 | seabios +2 | 1.13.0-2.module+el8.2.1+7284+aa32a2c4 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | supermin +1 | 5.1.19-10.module+el8.2.0+4793+b09dd2fb | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | swtpm +3 | 0.2.0-2.20200127gitff5a83b.module+el8.2.0+5579+d71178e0 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | swtpm-tools-pkcs11 | 0.6.0-2.20210607gitea627b3.module+el8.5.0+12696+4ce1c6bc | RHSA-2022:0949 |
| RHEL 8 | virglrenderer +2 | 0.8.2-1.module+el8.2.0+5777+d9c2af8c | RHSA-2022:0973 |
| RHEL 8 | virt-dib +25 | 1:1.40.2-24.module+el8.2.1+7154+47ffd890 | RHSA-2022:0973, RHSA-2022:0971, RHSA-2022:0949 |
| RHEL 8 | virt-v2v-man-pages-ja +2 | 1:1.42.0-9.module+el8.4.0+9561+069bb9c1 | RHSA-2022:0971, RHSA-2022:0949 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | SLOF | 20191022-3.git899d9883.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0759 |
| RHEL 8.4 EUS | hivex +6 | 1.3.18-21.module+el8.4.0+10770+19c037f9 | RHSA-2022:0759 |
| RHEL 8.4 EUS | libguestfs-winsupport | 8.2-1.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0759 |
| RHEL 8.4 EUS | libiscsi +2 | 1.18.0-8.module+el8.1.0+4066+0f1aadab | RHSA-2022:0759 |
| RHEL 8.4 EUS | libnbd +5 | 1.2.2-1.module+el8.3.0+7353+9de0a3cc | RHSA-2022:0759 |
| RHEL 8.4 EUS | libvirt +28 | 6.0.0-35.2.module+el8.4.0+14226+d39fa4ab | RHSA-2022:0759 |
| RHEL 8.4 EUS | libvirt-dbus | 1.3.0-2.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0759 |
| RHEL 8.4 EUS | nbdkit +13 | 1.16.2-4.module+el8.3.0+6922+fd575af8 | RHSA-2022:0759 |
| RHEL 8.4 EUS | netcf +2 | 0.2.8-12.module+el8.1.0+4066+0f1aadab | RHSA-2022:0759 |
| RHEL 8.4 EUS | perl-Sys-Virt +2 | 6.0.0-1.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0759 |
| RHEL 8.4 EUS | qemu-img +10 | 15:4.2.0-48.module+el8.4.0+14171+d59d4af6.4 | RHSA-2022:0759 |
| RHEL 8.4 EUS | seabios +2 | 1.13.0-2.module+el8.3.0+7353+9de0a3cc | RHSA-2022:0759 |
| RHEL 8.4 EUS | sgabios +1 | 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab | RHSA-2022:0759 |
| RHEL 8.4 EUS | supermin +1 | 5.1.19-10.module+el8.3.0+6423+e4cb6418 | RHSA-2022:0759 |
| RHEL 8.4 EUS | virt-dib +25 | 1:1.40.2-27.module+el8.4.0+9282+0bdec052 | RHSA-2022:0759 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | libiscsi +2 | 1.18.0-8.module_el8.6.0+2880+7d9e3703 | ALSA-2022:0886 |
| AlmaLinux 8 | libvirt-dbus | 1.3.0-2.module_el8.6.0+2880+7d9e3703 | ALSA-2022:0886 |
| AlmaLinux 8 | netcf +2 | 0.2.8-12.module_el8.6.0+2880+7d9e3703 | ALSA-2022:0886 |
| AlmaLinux 8 | qemu-img +9 | 15:4.2.0-59.module_el8.5.0+2629+68d2f392.2 | ALSA-2022:0886 |
| AlmaLinux 8 | sgabios +1 | 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703 | ALSA-2022:0886 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | hivex | 1.3.18-21.module+el8.4.0+642+7e26f5e1 | RLSA-2022:0886 |
| Rocky Linux 8 | libguestfs | 1:1.40.2-28.module+el8.5.0+670+c4aa478c | RLSA-2022:0886 |
| Rocky Linux 8 | libguestfs-winsupport | 8.2-1.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | libiscsi | 1.18.0-8.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | libnbd | 1.2.2-1.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | libvirt | 6.0.0-37.1.module+el8.5.0+732+d204e9f7 | RLSA-2022:0886 |
| Rocky Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | nbdkit | 1.16.2-4.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | netcf | 0.2.8-12.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | perl-Sys-Virt +1 | 6.0.0-1.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | qemu-kvm | 5:4.2.0-59.module+el8.5.0+670+c4aa478c | RLSA-2022:0886 |
| Rocky Linux 8 | seabios | 1.13.0-2.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | sgabios | 1:0.20170427git-3.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
| Rocky Linux 8 | supermin | 5.1.19-10.module+el8.4.0+534+4680a14e | RLSA-2022:0886 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | qemu | 5.2.0-150300.112.4 | SUSE-SU-2022:0930-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE Micro 5.2 | qemu | 5.2.0-150300.112.4 | SUSE-SU-2022:0930-2 |
| SLE Micro 5.1 | qemu | 5.2.0-150300.112.4 | SUSE-SU-2022:0930-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | qemu | 6.2.0-41.1 | openSUSE-SU-2024:11907-1 |
| openSUSE Leap 15.3 | qemu | 5.2.0-150300.112.4 | openSUSE-SU-2022:0930-1 |
| openSUSE Leap 15.3 | qemu-linux-user | 5.2.0-150300.112.3 | openSUSE-SU-2022:0930-1 |
| openSUSE Leap 15.3 | qemu-testsuite | 5.2.0-150300.112.7 | openSUSE-SU-2022:0930-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | qemu | 6.2.0-18 | — |
| Azure Linux 2 (CBL-Mariner) | qemu | 6.2.0-5 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | hivex +6 | 1.3.18-21.module+el8.5.0+20365+3abb8f5b | ELSA-2022-0886 |
| Oracle Linux 8 | libguestfs-winsupport | 8.2-1.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | libnbd +5 | 1.2.2-1.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | libvirt +28 | 6.0.0-37.1.0.1.module+el8.5.0+20490+52363fdb | ELSA-2022-0886 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | nbdkit +13 | 1.16.2-4.0.1.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | perl-Sys-Virt +1 | 6.0.0-1.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | qemu-img +10 | 15:4.2.0-59.module+el8.5.0+20519+ef047602.2 | ELSA-2022-0886 |
| Oracle Linux 8 | seabios +2 | 1.13.0-2.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | supermin +1 | 5.1.19-10.module+el8.3.0+7860+a7792d29 | ELSA-2022-0886 |
| Oracle Linux 8 | virt-dib +25 | 1:1.40.2-28.0.1.module+el8.5.0+20363+3abb8f5b | ELSA-2022-0886 |
Advisories 17
- ALSA-2022:0886 Moderate: virt:rhel and virt-devel:rhel security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:0973 Red Hat Security Advisory: virt:av and virt-devel:av qemu-kvm security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2022:0971 Red Hat Security Advisory: virt:av and virt-devel:av security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2022:0949 Red Hat Security Advisory: virt:av and virt-devel:av security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2022:0886 Red Hat Security Advisory: virt:rhel and virt-devel:rhel security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2022:0759 Red Hat Security Advisory: virt:rhel and virt-devel:rhel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-5307-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5489-1 qemu vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5133-1 qemu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2022-0886 Low: virt:ol and virt-devel:ol security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 16, 2026
- RLSA-2022:0886 Moderate: virt:rhel and virt-devel:rhel security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2022:0930-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0930-1 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0930-2 Security update for qemu SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11907-1 qemu-6.2.0-41.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2022-0421 QEMU: Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Sep 2, 2024
- NCSC-2024-0339 Kwetsbaarheden verholpen in Microsoft Mariner NCSC-NL (Netherlands) · Aug 13, 2024