Description
A flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | libnbd | 1.18.0 – < 1.18.5, 1.20.0 – < 1.20.2 | 1.18.5 |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 Advanced Virtualization | — | — |
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 | libnbd | 1.20.2-1 | — |
| Debian 13 | libnbd | 1.20.2-1 | — |
| Debian 12 | libnbd | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libnbd | No fix yet | — |
| Ubuntu 26.04 LTS | libnbd | No fix yet | — |
| Ubuntu 25.10 | libnbd | No fix yet | — |
| Ubuntu 24.04 LTS | libnbd | No fix yet | — |
| Ubuntu 22.04 LTS | libnbd | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libnbd | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | libnbd +6 | 1.18.1-4.el9_4 | RHSA-2024:6757 |
| RHEL 8 | SLOF | 20210217-2.module+el8.10.0+20141+6faa2812 | RHSA-2024:6964 |
| RHEL 8 | hivex +6 | 1.3.18-23.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | libguestfs-winsupport | 8.10-1.module+el8.10.0+19908+9938c7c9 | RHSA-2024:6964 |
| RHEL 8 | libiscsi +2 | 1.18.0-8.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | libnbd +6 | 1.6.0-6.module+el8.10.0+22250+3c790083 | RHSA-2024:6964 |
| RHEL 8 | libtpms +1 | 0.9.1-2.20211126git1ff6fe1f43.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | libvirt +27 | 8.0.0-23.2.module+el8.10.0+21972+d7867348 | RHSA-2024:6964 |
| RHEL 8 | libvirt-dbus | 1.3.0-2.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | libvirt-python +1 | 8.0.0-2.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | nbdkit +18 | 1.24.0-5.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | netcf +2 | 0.2.8-12.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | perl-Sys-Virt | 8.0.0-1.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | qemu-img +14 | 15:6.2.0-53.module+el8.10.0+22268+f82ccd96 | RHSA-2024:6964 |
| RHEL 8 | seabios +2 | 1.16.0-4.module+el8.9.0+19570+14a90618 | RHSA-2024:6964 |
| RHEL 8 | sgabios +1 | 1:0.20170427git-3.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | supermin +1 | 5.2.1-2.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | swtpm +4 | 0.7.0-4.20211109gitb79fd91.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | virt-dib +24 | 1:1.44.0-9.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
| RHEL 8 | virt-v2v +3 | 1:1.42.0-22.module+el8.9.0+18724+20190c23 | RHSA-2024:6964 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | libnbd +6 | 1.18.1-4.el9_4 | ALSA-2024:6757 |
| AlmaLinux 8 | SLOF | 20210217-2.module_el8.10.0+3768+dfd76e10 | ALSA-2024:6964 |
| AlmaLinux 8 | hivex +6 | 1.3.18-23.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | libguestfs-winsupport | 8.10-1.module_el8.10.0+3768+dfd76e10 | ALSA-2024:6964 |
| AlmaLinux 8 | libiscsi +2 | 1.18.0-8.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | libnbd +6 | 1.6.0-6.module_el8.10.0+3897+eb84924d | ALSA-2024:6964 |
| AlmaLinux 8 | libtpms +1 | 0.9.1-2.20211126git1ff6fe1f43.module_el8.9.0+3659+9c8643f3 | ALSA-2024:6964 |
| AlmaLinux 8 | libvirt +25 | 8.0.0-23.2.module_el8.10.0+3867+f3f9981a | ALSA-2024:6964 |
| AlmaLinux 8 | libvirt-daemon-driver-storage +1 | 8.0.0-23.2.module_el8.10.0+3869+b8959270 | ALSA-2024:6964 |
| AlmaLinux 8 | libvirt-dbus | 1.3.0-2.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | nbdkit +18 | 1.24.0-5.module_el8.8.0+3485+7cffc4a3 | ALSA-2024:6964 |
| AlmaLinux 8 | netcf +2 | 0.2.8-12.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | perl-Sys-Virt | 8.0.0-1.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | python3-libvirt | 8.0.0-2.module_el8.7.0+3346+68867adb | ALSA-2024:6964 |
| AlmaLinux 8 | qemu-img +14 | 15:6.2.0-53.module_el8.10.0+3897+eb84924d | ALSA-2024:6964 |
| AlmaLinux 8 | seabios +2 | 1.16.0-4.module_el8.9.0+3659+9c8643f3 | ALSA-2024:6964 |
| AlmaLinux 8 | sgabios +1 | 1:0.20170427git-3.module_el8.6.0+2880+7d9e3703 | ALSA-2024:6964 |
| AlmaLinux 8 | supermin +1 | 5.2.1-2.module_el8.7.0+3346+68867adb | ALSA-2024:6964 |
| AlmaLinux 8 | swtpm +4 | 0.7.0-4.20211109gitb79fd91.module_el8.7.0+3346+68867adb | ALSA-2024:6964 |
| AlmaLinux 8 | virt-dib +24 | 1:1.44.0-9.module_el8.7.0+3493+5ed0bd1c.alma | ALSA-2024:6964 |
| AlmaLinux 8 | virt-v2v +3 | 1:1.42.0-22.module_el8.9.0+3659+9c8643f3 | ALSA-2024:6964 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | libnbd | 1.18.1-4.el9_4 | RLSA-2024:6757 |
| Rocky Linux 8 | hivex | 1.3.18-23.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | libguestfs | 1:1.44.0-9.module+el8.10.0+1590+a67ab969.rocky | RLSA-2024:6964 |
| Rocky Linux 8 | libguestfs-winsupport | 8.10-1.module+el8.10.0+1451+358d0d76 | RLSA-2024:6964 |
| Rocky Linux 8 | libiscsi | 1.18.0-8.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | libnbd | 1.6.0-6.module+el8.10.0+1870+0a714c9f | RLSA-2024:6964 |
| Rocky Linux 8 | libtpms | 0.9.1-2.20211126git1ff6fe1f43.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | libvirt | 8.0.0-23.2.module+el8.10.0+1835+43f01cbb | RLSA-2024:6964 |
| Rocky Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | libvirt-python | 8.0.0-2.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | nbdkit | 1.24.0-5.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | netcf | 0.2.8-12.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | perl-Sys-Virt | 8.0.0-1.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | qemu-kvm | 5:6.2.0-53.module+el8.10.0+1870+0a714c9f | RLSA-2024:6964 |
| Rocky Linux 8 | seabios | 1.16.0-4.module+el8.9.0+1408+7b966129 | RLSA-2024:6964 |
| Rocky Linux 8 | sgabios | 1:0.20170427git-3.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | supermin | 5.2.1-2.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | swtpm | 0.7.0-4.20211109gitb79fd91.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
| Rocky Linux 8 | virt-v2v | 1:1.42.0-22.module+el8.10.0+1590+a67ab969 | RLSA-2024:6964 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | libnbd | 1.18.5-150600.18.3.1 | SUSE-SU-2024:2813-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libnbd | 1.20.2-1.1 | openSUSE-SU-2024:14240-1 |
| openSUSE Leap 15.6 | libnbd | 1.18.5-150600.18.3.1 | SUSE-SU-2024:2813-1 |
| openSUSE Leap 15.5 | libnbd | 1.18.5-150300.8.21.1 | SUSE-SU-2024:2789-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libnbd | 1.18.3-3 | — |
| Azure Linux 2 (CBL-Mariner) | libnbd | 1.12.1-4 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | libnbd +6 | 1.18.1-4.0.1.el9_4 | ELSA-2024-6757 |
| Oracle Linux 8 | hivex +6 | 1.3.18-23.module+el8.9.0+90075+85334608 | ELSA-2024-6964 |
| Oracle Linux 8 | libguestfs-winsupport | 8.10-1.module+el8.10.0+90308+7c659588 | ELSA-2024-6964 |
| Oracle Linux 8 | libiscsi +2 | 1.18.0-8.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | libnbd +6 | 1.6.0-6.module+el8.10.0+90410+bcde3bf4 | ELSA-2024-6964 |
| Oracle Linux 8 | libtpms +1 | 0.9.1-2.20211126git1ff6fe1f43.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | libvirt +27 | 8.0.0-23.2.0.1.module+el8.10.0+90363+955e9a81 | ELSA-2024-6964 |
| Oracle Linux 8 | libvirt-dbus | 1.3.0-2.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | nbdkit +18 | 1.24.0-5.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | netcf +2 | 0.2.8-12.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | perl-Sys-Virt | 8.0.0-1.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | python3-libvirt | 8.0.0-2.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | qemu-img +14 | 15:6.2.0-53.module+el8.10.0+90410+bcde3bf4 | ELSA-2024-6964 |
| Oracle Linux 8 | seabios +2 | 1.16.0-4.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | sgabios +1 | 1:0.20170427git-3.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | supermin +1 | 5.2.1-2.0.1.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | swtpm +4 | 0.7.0-4.20211109gitb79fd91.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | virt-dib +24 | 1:1.44.0-9.0.2.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
| Oracle Linux 8 | virt-v2v +3 | 1:1.42.0-22.module+el8.9.0+90052+d3bf71d8 | ELSA-2024-6964 |
Advisories 12
- ALSA-2024:6757 Moderate: libnbd security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:6964 Moderate: virt:rhel and virt-devel:rhel security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:6964 Red Hat Security Advisory: virt:rhel and virt-devel:rhel security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2024:6757 Red Hat Security Advisory: libnbd security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- WID-SEC-2024-2179 Red Hat Enterprise Linux (libnbd): Schwachstelle ermöglicht Man-in-the-middle-Bedingung BSI CERT-Bund (WID) · Mar 26, 2026
- RLSA-2024:6757 Moderate: libnbd security update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2024:2789-1 Security update for libnbd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2813-1 Security update for libnbd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14240-1 libnbd-1.20.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RLSA-2024:6964 Moderate: virt:rhel and virt-devel:rhel security update Rocky Linux Security Advisories · May 7, 2025
- ELSA-2024-6964 Moderate: virt:ol and virt-devel:ol security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 24, 2024
- ELSA-2024-6757 Moderate: libnbd security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Sep 19, 2024
References
- RHSA-2024:6757 vendor-advisory
- RHSA-2024:6964 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2024-7383 vdb-entry
- RHBZ#2302865 issue-tracking
- https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/message/LHR3BW6RJ7K4BJBQIYV3GTZLSY27VZO2
- https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/ENZY4LHLARA3N4C3JUNLPYUCXHFO7BWQ/