Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the CephX authentication protocol encrypts tickets with AES-128-CBC in an unauthenticated mode that uses a hard-coded initialization vector and no message authentication, allowing an attacker to forge credentials and gain cluster-wide access. Because the ciphertext is malleable and the monitor will encrypt attacker-chosen entity names, an attacker holding one low-privilege key and able to observe CephX traffic can use the monitor as an encryption oracle and splice ciphertext blocks into valid tickets for privileged entities such as Manager, MDS, and OSD. The same lack of authentication also lets an attacker with CephX permissions escalate privileges by flipping a single bit in a service ticket to set its allow_all field to true. This issue is fixed in versions 20.2.4 and 19.2.6.

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

  - Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions
    prior to 20.2.4 and 19.2.6, the CephX authentication protocol encrypts tickets with AES-128-CBC in an
    unauthenticated mode that uses a hard-coded initialization vector and no message authentication, allowing
    an attacker to forge credentials and gain cluster-wide access. Because the ciphertext is malleable and the
    monitor will encrypt attacker-chosen entity names, an attacker holding one low-privilege key and able to
    observe CephX traffic can use the monitor as an encryption oracle and splice ciphertext blocks into valid
    tickets for privileged entities such as Manager, MDS, and OSD. The same lack of authentication also lets
    an attacker with CephX permissions escalate privileges by flipping a single bit in a service ticket to set
    its allow_all field to true. This issue is fixed in versions 20.2.4 and 19.2.6. (CVE-2025-30156)

The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1745 advisory.

    This advisory aggregates security fixes for the kernel SRPM in CIQ FIPS 9.6 Compliant. It addresses 18     CVEs: CVE-2026-64439, CVE-2026-72130, CVE-2026-31418, CVE-2025-30156, CVE-2026-98725, and 13 more.

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 remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:79101 advisory.

    Red Hat Ceph Storage is a scalable, open, software-defined storage platform that combines the most stable     version of the Ceph storage system with a Ceph management platform, deployment utilities, and support     services.

    These new packages include numerous security and bug fixes. Space precludes documenting all of these     changes in this advisory. Users are directed to the Red Hat Ceph Storage Release Notes for information on     the most significant of these changes:

    https://docs.redhat.com/en/documentation/red_hat_ceph_storage/8/html/8.1_release_notes

    ==========================================     IMPORTANT:
    The Red Hat Ceph Storage team has migrated our defect tracking from Bugzilla to an internal Jira system.
    Bug fixes and CVE information that was previously listed in the errata releases are now listed in the     Release Notes.

    Refer to the release notes going forward for the latest and most accurate fix and CVE information.
    ==========================================

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7de7d03796 advisory.

    # Ceph 20.2.4 GA

    * CVE-2025-30156 is an authentication bypass in CephX caused by misuse of AES-CBC.
    >    https://docs.ceph.com/en/latest/security/CVE-2025-30156
    * CVE-2026-39944 shares the unauthenticated-encryption root cause of CVE-2025-30156     >    https://docs.ceph.com/en/latest/security/CVE-2026-39944
    * CVE-2026-50152 is an improper authorization flaw in the Ceph Monitor subscription handler.
    >    https://docs.ceph.com/en/latest/security/CVE-2026-50152
    * CVE-2026-54330 is a flaw in RGW not properly verifying its SigV4 cryptographic signatures in RGW's SigV4     verifier.
    >    https://docs.ceph.com/en/latest/security/CVE-2026-54330



Tenable has extracted the preceding description block directly from the Fedora 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 remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ebffec502b advisory.

    # Ceph 19.2.6 GA

    * CVE-2025-30156 is an authentication bypass in CephX caused by misuse of AES-CBC.
    >    https://docs.ceph.com/en/latest/security/CVE-2025-30156
    * CVE-2026-39944 shares the unauthenticated-encryption root cause of CVE-2025-30156     >    https://docs.ceph.com/en/latest/security/CVE-2026-39944
    * CVE-2026-50152 is an improper authorization flaw in the Ceph Monitor subscription handler.
    >    https://docs.ceph.com/en/latest/security/CVE-2026-50152
    * CVE-2026-54330 is a flaw in RGW not properly verifying its SigV4 cryptographic signatures in RGW's SigV4     verifier.
    >    https://docs.ceph.com/en/latest/security/CVE-2026-54330


Tenable has extracted the preceding description block directly from the Fedora 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions     prior to 20.2.4 and 19.2.6, the CephX authentication protocol encrypts tickets with AES-128-CBC in an     unauthenticated mode that uses a hard-coded initialization vector and no message authentication, allowing     an attacker to forge credentials and gain cluster-wide access. Because the ciphertext is malleable and the     monitor will encrypt attacker-chosen entity names, an attacker holding one low-privilege key and able to     observe CephX traffic can use the monitor as an encryption oracle and splice ciphertext blocks into valid     tickets for privileged entities such as Manager, MDS, and OSD. The same lack of authentication also lets     an attacker with CephX permissions escalate privileges by flipping a single bit in a service ticket to set     its allow_all field to true. This issue is fixed in versions 20.2.4 and 19.2.6. (CVE-2025-30156)

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

ID	Name	Product	Family	Type	Severity
478670	Echo: ceph: security update to 20.2.4+ds-1	Tenable Cloud Security	Echo Local Security Checks	Local	high
478670	Echo: ceph: security update to 20.2.4+ds-1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
374838	Rocky Linux 9.6 [CIQ] Security Update: kernel / kernel-64k / kernel-64k-core / kernel-64k-debug / etc Multiple Vulnerabilities (ciqsa-2026_1745)	Nessus	Rocky Linux Local Security Checks	Local	medium
369296	RHEL 9 : Red Hat Ceph Storage 8.1 (RHSA-2026:79101)	Nessus	Red Hat Local Security Checks	Local	medium
338829	Fedora 44 : ceph (2026-7de7d03796)	Nessus	Fedora Local Security Checks	Local	critical
338789	Fedora 43 : ceph (2026-ebffec502b)	Nessus	Fedora Local Security Checks	Local	critical
338279	Linux Distros Unpatched Vulnerability : CVE-2025-30156	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2025-30156

high

Tenable Plugins

high

high

medium

medium

critical

critical

high