A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1633 advisory.

    This advisory aggregates security fixes for the libnbd SRPM in CIQ LTS 9.6. It addresses 4 CVEs:
    CVE-2023-5871, CVE-2019-14842, CVE-2021-20286, CVE-2022-0485.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_0445 advisory.

    This advisory aggregates security fixes for the libnbd SRPM in CIQ LTS 9.2. It addresses 4 CVEs:
    CVE-2024-7383, CVE-2019-14842, CVE-2021-20286, CVE-2022-0485.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to
    denial of service. (CVE-2021-20286)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to     denial of service. (CVE-2021-20286)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of libnbd installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2021-20286 advisory.

  - A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c May lead to     denial of service. (CVE-2021-20286)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2021:2274-1 advisory.

  - A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to     denial of service. (CVE-2021-20286)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2021:2274-1 advisory.

    General:

    - Updated kubevirt to version 0.40.0
    - Fixed an issue when calling `virsh-domcapabilities`
    - Fixed the the wrong registry path for containers.

    Security fixes:

    - CVE-2021-20286: A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go       in ilb/opt.c may lead to denial of service.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
364631	Rocky Linux 9.6 [CIQ] Security Update: libnbd / libnbd-bash-completion / libnbd-devel / nbdfuse / etc Multiple Vulnerabilities (ciqsa-2026_1633)	Nessus	Rocky Linux Local Security Checks	Local	critical
354442	Rocky Linux 9.2 [CIQ] Security Update: libnbd / libnbd-bash-completion / libnbd-debuginfo / etc Multiple Vulnerabilities (ciqsa-2026_0445)	Nessus	Rocky Linux Local Security Checks	Local	critical
427191	Alpine: multiple libnbd packages: security update to 1.10.5-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	low
427191	Alpine: multiple libnbd packages: security update to 1.10.5-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	low
223663	Linux Distros Unpatched Vulnerability : CVE-2021-20286	Nessus	Misc.	Local	low
206374	CBL Mariner 2.0 Security Update: libnbd (CVE-2021-20286)	Nessus	MarinerOS Local Security Checks	Local	low
151720	openSUSE 15 Security Update : kubevirt (openSUSE-SU-2021:2274-1)	Nessus	SuSE Local Security Checks	Local	low
151481	SUSE SLES15: containerized-data-importer-manifests / kubevirt-manifests / etc (SUSE-SU-2021:2274-1)	Nessus	SuSE Local Security Checks	Local	low

Detections

Analytics

CVE-2021-20286

low

Tenable Plugins

critical

critical

low

low

low

low

low

low