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

  - In the Linux kernel, the following vulnerability has been resolved: ublk: clean up user copy references on     ublk server exit If a ublk server process releases a ublk char device file, any requests dispatched to the     ublk server but not yet completed will retain a ref value of UBLK_REFCOUNT_INIT. Before commit     e63d2228ef83 (ublk: simplify aborting ublk request), __ublk_fail_req() would decrement the reference     count before completing the failed request. However, that commit optimized __ublk_fail_req() to call
    __ublk_complete_rq() directly without decrementing the request reference count. The leaked reference count     incorrectly allows user copy and zero copy operations on the completed ublk request. It also triggers the     WARN_ON_ONCE(refcount_read(&io->ref)) warnings in ublk_queue_reinit() and ublk_deinit_queue(). Commit     c5c5eb24ed61 (ublk: avoid ublk_io_release() called after ublk char dev is closed) already fixed the     issue for ublk devices using UBLK_F_SUPPORT_ZERO_COPY or UBLK_F_AUTO_BUF_REG. However, the reference count     leak also affects UBLK_F_USER_COPY, the other reference-counted data copy mode. Fix the condition in     ublk_check_and_reset_active_ref() to include all reference-counted data copy modes. This ensures that any     ublk requests still owned by the ublk server when it exits have their reference counts reset to 0.
    (CVE-2025-71070)

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

The remote Ubuntu 25.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8177-1 advisory.

    Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD     Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A     privileged attacker could possibly use this issue to cause load malicious CPU microcode causing loss of     integrity and confidentiality. (CVE-2024-36347)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - MIPS architecture;

    - PowerPC architecture;

    - User-Mode Linux (UML);

    - x86 architecture;

    - Block layer subsystem;

    - Cryptographic API;

    - ACPI drivers;

    - Ublk userspace block driver;

    - Bluetooth drivers;

    - Character device driver;

    - TPM device driver;

    - Clock framework and drivers;

    - GPU drivers;

    - Hardware monitoring drivers;

    - Intel Trace Hub HW tracing drivers;

    - InfiniBand drivers;

    - Input Device core drivers;

    - Input Device (Mouse) drivers;

    - IOMMU subsystem;

    - Multiple devices driver;

    - Media drivers;

    - Network drivers;

    - Mellanox network drivers;

    - STMicroelectronics network drivers;

    - Ethernet team driver;

    - PA-RISC drivers;

    - Chrome hardware platform drivers;

    - x86 platform drivers;

    - SCSI subsystem;

    - SPI subsystem;

    - TCM subsystem;

    - Freescale USB OTG Transceiver Driver;

    - USB Type-C Connector System Software Interface driver;

    - Watchdog drivers;

    - BTRFS file system;

    - exFAT file system;

    - Ext4 file system;

    - F2FS file system;

    - FUSE (File system in Userspace);

    - HFS+ file system;

    - File systems infrastructure;

    - Network file system (NFS) server daemon;

    - File system notification infrastructure;

    - NTFS3 file system;

    - OCFS2 file system;

    - SMB network file system;

    - XFS file system;

    - User-space API (UAPI);

    - io_uring subsystem;

    - Scheduler infrastructure;

    - Shadow Call Stack mechanism;

    - Tracing infrastructure;

    - Memory management;

    - BPF subsystem;

    - CAIF protocol;

    - Ceph Core library;

    - Networking core;

    - Ethtool driver;

    - Handshake API;

    - HSR network protocol;

    - IPv4 networking;

    - IPv6 networking;

    - Multipath TCP;

    - Netfilter;

    - NET/ROM layer;

    - NFC subsystem;

    - Open vSwitch;

    - Rose network layer;

    - Network traffic control;

    - Sun RPC protocol;

    - Key management;

    - Landlock security;

    - STMicroelectronics SoC drivers;

    - USB sound devices;

    - KVM subsystem; (CVE-2025-68351, CVE-2025-68353, CVE-2025-68365, CVE-2025-68368, CVE-2025-68725,     CVE-2025-68736, CVE-2025-68745, CVE-2025-68767, CVE-2025-68768, CVE-2025-68769, CVE-2025-68770,     CVE-2025-68771, CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775, CVE-2025-68776,     CVE-2025-68777, CVE-2025-68778, CVE-2025-68780, CVE-2025-68781, CVE-2025-68782, CVE-2025-68783,     CVE-2025-68784, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787, CVE-2025-68788, CVE-2025-68791,     CVE-2025-68792, CVE-2025-68793, CVE-2025-68794, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797,     CVE-2025-68798, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68802, CVE-2025-68803,     CVE-2025-68804, CVE-2025-68805, CVE-2025-68806, CVE-2025-68807, CVE-2025-68808, CVE-2025-68809,     CVE-2025-68810, CVE-2025-68811, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816,     CVE-2025-68817, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-68821, CVE-2025-68822,     CVE-2025-68823, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067, CVE-2025-71068,     CVE-2025-71069, CVE-2025-71070, CVE-2025-71071, CVE-2025-71072, CVE-2025-71073, CVE-2025-71075,     CVE-2025-71076, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71080, CVE-2025-71081,     CVE-2025-71082, CVE-2025-71083, CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087,     CVE-2025-71089, CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71095, CVE-2025-71096,     CVE-2025-71097, CVE-2025-71098, CVE-2025-71099, CVE-2025-71100, CVE-2025-71101, CVE-2025-71102,     CVE-2025-71104, CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109, CVE-2025-71111,     CVE-2025-71112, CVE-2025-71113, CVE-2025-71114, CVE-2025-71115, CVE-2025-71116, CVE-2025-71117,     CVE-2025-71118, CVE-2025-71119, CVE-2025-71120, CVE-2025-71121, CVE-2025-71122, CVE-2025-71123,     CVE-2025-71124, CVE-2025-71125, CVE-2025-71126, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132,     CVE-2025-71133, CVE-2025-71135, CVE-2025-71136, CVE-2025-71137, CVE-2025-71138, CVE-2025-71140,     CVE-2025-71143, CVE-2025-71146, CVE-2025-71147, CVE-2025-71148, CVE-2025-71149, CVE-2025-71150,     CVE-2025-71151, CVE-2025-71153, CVE-2025-71154, CVE-2025-71156, CVE-2025-71157, CVE-2026-23091,     CVE-2026-23209)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Ubuntu 24.04 LTS / 25.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8183-1 advisory.

    Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD     Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A     privileged attacker could possibly use this issue to cause load malicious CPU microcode causing loss of     integrity and confidentiality. (CVE-2024-36347)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - MIPS architecture;

    - PowerPC architecture;

    - User-Mode Linux (UML);

    - x86 architecture;

    - Block layer subsystem;

    - Cryptographic API;

    - ACPI drivers;

    - Ublk userspace block driver;

    - Bluetooth drivers;

    - Character device driver;

    - TPM device driver;

    - Clock framework and drivers;

    - GPU drivers;

    - Hardware monitoring drivers;

    - Intel Trace Hub HW tracing drivers;

    - InfiniBand drivers;

    - Input Device core drivers;

    - Input Device (Mouse) drivers;

    - IOMMU subsystem;

    - Multiple devices driver;

    - Media drivers;

    - Network drivers;

    - Mellanox network drivers;

    - STMicroelectronics network drivers;

    - Ethernet team driver;

    - PA-RISC drivers;

    - Chrome hardware platform drivers;

    - x86 platform drivers;

    - SCSI subsystem;

    - SPI subsystem;

    - TCM subsystem;

    - Freescale USB OTG Transceiver Driver;

    - USB Type-C Connector System Software Interface driver;

    - Watchdog drivers;

    - BTRFS file system;

    - exFAT file system;

    - Ext4 file system;

    - F2FS file system;

    - FUSE (File system in Userspace);

    - HFS+ file system;

    - File systems infrastructure;

    - Network file system (NFS) server daemon;

    - File system notification infrastructure;

    - NTFS3 file system;

    - OCFS2 file system;

    - SMB network file system;

    - XFS file system;

    - User-space API (UAPI);

    - io_uring subsystem;

    - Scheduler infrastructure;

    - Shadow Call Stack mechanism;

    - Tracing infrastructure;

    - Memory management;

    - BPF subsystem;

    - CAIF protocol;

    - Ceph Core library;

    - Networking core;

    - Ethtool driver;

    - Handshake API;

    - HSR network protocol;

    - IPv4 networking;

    - IPv6 networking;

    - Multipath TCP;

    - Netfilter;

    - NET/ROM layer;

    - NFC subsystem;

    - Open vSwitch;

    - Rose network layer;

    - Network traffic control;

    - Sun RPC protocol;

    - Key management;

    - Landlock security;

    - STMicroelectronics SoC drivers;

    - USB sound devices;

    - KVM subsystem; (CVE-2025-68351, CVE-2025-68353, CVE-2025-68365, CVE-2025-68368, CVE-2025-68725,     CVE-2025-68736, CVE-2025-68745, CVE-2025-68767, CVE-2025-68768, CVE-2025-68769, CVE-2025-68770,     CVE-2025-68771, CVE-2025-68772, CVE-2025-68773, CVE-2025-68774, CVE-2025-68775, CVE-2025-68776,     CVE-2025-68777, CVE-2025-68778, CVE-2025-68780, CVE-2025-68781, CVE-2025-68782, CVE-2025-68783,     CVE-2025-68784, CVE-2025-68785, CVE-2025-68786, CVE-2025-68787, CVE-2025-68788, CVE-2025-68791,     CVE-2025-68792, CVE-2025-68793, CVE-2025-68794, CVE-2025-68795, CVE-2025-68796, CVE-2025-68797,     CVE-2025-68798, CVE-2025-68799, CVE-2025-68800, CVE-2025-68801, CVE-2025-68802, CVE-2025-68803,     CVE-2025-68804, CVE-2025-68805, CVE-2025-68806, CVE-2025-68807, CVE-2025-68808, CVE-2025-68809,     CVE-2025-68810, CVE-2025-68811, CVE-2025-68813, CVE-2025-68814, CVE-2025-68815, CVE-2025-68816,     CVE-2025-68817, CVE-2025-68818, CVE-2025-68819, CVE-2025-68820, CVE-2025-68821, CVE-2025-68822,     CVE-2025-68823, CVE-2025-71064, CVE-2025-71065, CVE-2025-71066, CVE-2025-71067, CVE-2025-71068,     CVE-2025-71069, CVE-2025-71070, CVE-2025-71071, CVE-2025-71072, CVE-2025-71073, CVE-2025-71075,     CVE-2025-71076, CVE-2025-71077, CVE-2025-71078, CVE-2025-71079, CVE-2025-71081, CVE-2025-71082,     CVE-2025-71083, CVE-2025-71084, CVE-2025-71085, CVE-2025-71086, CVE-2025-71087, CVE-2025-71089,     CVE-2025-71091, CVE-2025-71093, CVE-2025-71094, CVE-2025-71095, CVE-2025-71096, CVE-2025-71097,     CVE-2025-71098, CVE-2025-71099, CVE-2025-71100, CVE-2025-71101, CVE-2025-71102, CVE-2025-71104,     CVE-2025-71105, CVE-2025-71107, CVE-2025-71108, CVE-2025-71109, CVE-2025-71111, CVE-2025-71112,     CVE-2025-71113, CVE-2025-71114, CVE-2025-71115, CVE-2025-71116, CVE-2025-71117, CVE-2025-71118,     CVE-2025-71119, CVE-2025-71120, CVE-2025-71121, CVE-2025-71122, CVE-2025-71123, CVE-2025-71124,     CVE-2025-71125, CVE-2025-71126, CVE-2025-71130, CVE-2025-71131, CVE-2025-71132, CVE-2025-71133,     CVE-2025-71135, CVE-2025-71136, CVE-2025-71137, CVE-2025-71138, CVE-2025-71140, CVE-2025-71143,     CVE-2025-71146, CVE-2025-71147, CVE-2025-71148, CVE-2025-71149, CVE-2025-71150, CVE-2025-71151,     CVE-2025-71153, CVE-2025-71154, CVE-2025-71156, CVE-2025-71157, CVE-2026-23091, CVE-2026-23209)

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

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

ID	Name	Product	Family	Published	Updated	Severity
283592	Linux Distros Unpatched Vulnerability : CVE-2025-71070	Nessus	Misc.	1/13/2026	4/20/2026	high
307005	Ubuntu 25.10 : Linux kernel vulnerabilities (USN-8177-1)	Nessus	Ubuntu Local Security Checks	4/17/2026	4/17/2026	high
307549	Ubuntu 24.04 LTS / 25.10 : Linux kernel (GCP) vulnerabilities (USN-8183-1)	Nessus	Ubuntu Local Security Checks	4/20/2026	4/20/2026	high

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