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

  - virtio_net: Fix misalignment bug in struct virtnet_info Use the new TRAILING_OVERLAP() helper to fix a     misalignment bug along with the following warning: drivers/net/virtio_net.c:429:46: warning: structure     containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]     This helper creates a union between a flexible-array member (FAM) and a set of members that would     otherwise follow it (in this case `u8 rss_hash_key_data[VIRTIO_NET_RSS_MAX_KEY_SIZE];`). This overlays the     trailing members (rss_hash_key_data) onto the FAM (hash_key_data) while keeping the FAM and the start of     MEMBERS aligned. The static_assert() ensures this alignment remains. Notice that due to tail padding in     flexible `struct virtio_net_rss_config_trailer`, `rss_trailer.hash_key_data` (at offset 83 in struct     virtnet_info) and `rss_hash_key_data` (at offset 84 in struct virtnet_info) are misaligned by one byte.
    See below: struct virtio_net_rss_config_trailer { __le16 max_tx_vq; /* 0 2 */ __u8 hash_key_length; /* 2 1
    */ __u8 hash_key_data[]; /* 3 0 */ /* size: 4, cachelines: 1, members: 3 */ /* padding: 1 */ /* last     cacheline: 4 bytes */ }; struct virtnet_info { ... struct virtio_net_rss_config_trailer rss_trailer; /* 80     4 */ /* XXX last struct has 1 byte of padding */ u8 rss_hash_key_data[40]; /* 84 40 */ ... /* size: 832,     cachelines: 13, members: 48 */ /* sum members: 801, holes: 8, sum holes: 31 */ /* paddings: 2, sum     paddings: 5 */ }; After changes, those members are correctly aligned at offset 795: struct virtnet_info {     ... union { struct virtio_net_rss_config_trailer rss_trailer; /* 792 4 */ struct { unsigned char
    __offset_to_hash_key_data[3]; /* 792 3 */ u8 rss_hash_key_data[40]; /* 795 40 */ }; /* 792 43 */ }; /* 792     44 */ ... /* size: 840, cachelines: 14, members: 47 */ /* sum members: 801, holes: 8, sum holes: 35 */ /*     padding: 4 */ /* paddings: 1, sum paddings: 4 */ /* last cacheline: 8 bytes */ }; As a result, the RSS key     passed to the device is shifted by 1 byte: the last byte is cut off, and instead a (possibly     uninitialized) byte is added at the beginning. As a last note `struct virtio_net_rss_config_hdr *rss_hdr;`     is also moved to the end, since it seems those three members should stick around together. :)     (CVE-2026-23143)

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

The remote Ubuntu 24.04 LTS / Pro Realtime 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8669-1 advisory.

    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:

    - Foo-over-UDP (FOU);

    - ARM64 architecture;

    - x86 architecture;

    - Block layer subsystem;

    - Drivers core;

    - Null block device driver;

    - Bluetooth drivers;

    - Counter interface drivers;

    - DMA engine subsystem;

    - DPLL subsystem;

    - GPIO subsystem;

    - GPU drivers;

    - I2C subsystem;

    - IIO ADC drivers;

    - IIO subsystem;

    - InfiniBand drivers;

    - On-Chip Interconnect management framework;

    - IOMMU subsystem;

    - IRQ chip drivers;

    - Modular ISDN driver;

    - LED subsystem;

    - Multiple devices driver;

    - Media drivers;

    - UACCE accelerator framework;

    - MMC subsystem;

    - Ethernet bonding driver;

    - Network drivers;

    - Mellanox network drivers;

    - Texas Instruments network drivers;

    - NVME drivers;

    - Device tree and open firmware driver;

    - PHY drivers;

    - x86 platform drivers;

    - i.MX PM domains;

    - SCSI subsystem;

    - SLIMbus drivers;

    - SPI subsystem;

    - TTY drivers;

    - USB Host Controller drivers;

    - W1 Dallas's 1-wire bus driver;

    - Xen hypervisor drivers;

    - BTRFS file system;

    - EFI Variable file system;

    - File systems infrastructure;

    - Ext4 file system;

    - FUSE (File system in Userspace);

    - Network file systems library;

    - Network file system (NFS) client;

    - Network file system (NFS) server daemon;

    - SMB network file system;

    - Memory Management;

    - Memory management;

    - Scheduler infrastructure;

    - Tracing infrastructure;

    - IPv4 networking;

    - Netfilter;

    - NFC subsystem;

    - Network traffic control;

    - TCP network protocol;

    - io_uring subsystem;

    - Perf events;

    - Locking primitives;

    - Hibernation control;

    - Timer subsystem;

    - BPF subsystem;

    - Floating proportions library;

    - Bluetooth subsystem;

    - CAN network layer;

    - Ceph Core library;

    - Networking core;

    - IPv6 networking;

    - L2TP protocol;

    - MAC80211 subsystem;

    - Multipath TCP;

    - NET/ROM layer;

    - RxRPC session sockets;

    - SCTP protocol;

    - SMC sockets;

    - VMware vSockets driver;

    - Wireless networking;

    - ALSA AC97 driver;

    - Creative Sound Blaster X-Fi driver;

    - Texas InstrumentS Audio (ASoC/HDA) drivers;

    - USB sound devices; (CVE-2025-71158, CVE-2025-71160, CVE-2025-71161, CVE-2025-71162, CVE-2025-71163,     CVE-2025-71180, CVE-2025-71182, CVE-2025-71183, CVE-2025-71184, CVE-2025-71185, CVE-2025-71186,     CVE-2025-71187, CVE-2025-71188, CVE-2025-71189, CVE-2025-71190, CVE-2025-71191, CVE-2025-71192,     CVE-2025-71193, CVE-2025-71194, CVE-2025-71195, CVE-2025-71196, CVE-2025-71197, CVE-2025-71198,     CVE-2025-71199, CVE-2025-71200, CVE-2025-71201, CVE-2026-22976, CVE-2026-22977, CVE-2026-22978,     CVE-2026-22979, CVE-2026-22980, CVE-2026-22981, CVE-2026-22982, CVE-2026-22985, CVE-2026-22986,     CVE-2026-22987, CVE-2026-22989, CVE-2026-22990, CVE-2026-22991, CVE-2026-22992, CVE-2026-22993,     CVE-2026-22994, CVE-2026-22996, CVE-2026-22997, CVE-2026-22998, CVE-2026-22999, CVE-2026-23000,     CVE-2026-23001, CVE-2026-23002, CVE-2026-23003, CVE-2026-23004, CVE-2026-23005, CVE-2026-23006,     CVE-2026-23007, CVE-2026-23008, CVE-2026-23009, CVE-2026-23010, CVE-2026-23011, CVE-2026-23012,     CVE-2026-23013, CVE-2026-23014, CVE-2026-23015, CVE-2026-23017, CVE-2026-23018, CVE-2026-23019,     CVE-2026-23020, CVE-2026-23021, CVE-2026-23022, CVE-2026-23023, CVE-2026-23024, CVE-2026-23025,     CVE-2026-23026, CVE-2026-23030, CVE-2026-23031, CVE-2026-23032, CVE-2026-23033, CVE-2026-23034,     CVE-2026-23035, CVE-2026-23036, CVE-2026-23037, CVE-2026-23038, CVE-2026-23042, CVE-2026-23044,     CVE-2026-23045, CVE-2026-23046, CVE-2026-23047, CVE-2026-23049, CVE-2026-23050, CVE-2026-23051,     CVE-2026-23052, CVE-2026-23053, CVE-2026-23054, CVE-2026-23055, CVE-2026-23056, CVE-2026-23057,     CVE-2026-23058, CVE-2026-23059, CVE-2026-23061, CVE-2026-23062, CVE-2026-23063, CVE-2026-23064,     CVE-2026-23065, CVE-2026-23066, CVE-2026-23067, CVE-2026-23068, CVE-2026-23069, CVE-2026-23070,     CVE-2026-23071, CVE-2026-23072, CVE-2026-23073, CVE-2026-23075, CVE-2026-23076, CVE-2026-23077,     CVE-2026-23078, CVE-2026-23079, CVE-2026-23080, CVE-2026-23081, CVE-2026-23083, CVE-2026-23084,     CVE-2026-23085, CVE-2026-23086, CVE-2026-23087, CVE-2026-23088, CVE-2026-23089, CVE-2026-23090,     CVE-2026-23092, CVE-2026-23093, CVE-2026-23094, CVE-2026-23095, CVE-2026-23096, CVE-2026-23097,     CVE-2026-23098, CVE-2026-23099, CVE-2026-23100, CVE-2026-23101, CVE-2026-23102, CVE-2026-23103,     CVE-2026-23104, CVE-2026-23105, CVE-2026-23106, CVE-2026-23107, CVE-2026-23108, CVE-2026-23109,     CVE-2026-23110, CVE-2026-23113, CVE-2026-23114, CVE-2026-23115, CVE-2026-23116, CVE-2026-23118,     CVE-2026-23119, CVE-2026-23120, CVE-2026-23121, CVE-2026-23122, CVE-2026-23123, CVE-2026-23124,     CVE-2026-23125, CVE-2026-23126, CVE-2026-23128, CVE-2026-23129, CVE-2026-23130, CVE-2026-23131,     CVE-2026-23133, CVE-2026-23135, CVE-2026-23136, CVE-2026-23137, CVE-2026-23138, CVE-2026-23139,     CVE-2026-23140, CVE-2026-23141, CVE-2026-23142, CVE-2026-23143, CVE-2026-23144, CVE-2026-23145,     CVE-2026-23146, CVE-2026-23147, CVE-2026-23148, CVE-2026-23150, CVE-2026-23151, CVE-2026-23152,     CVE-2026-23154, CVE-2026-23156, CVE-2026-23157, CVE-2026-23158, CVE-2026-23159, CVE-2026-23160,     CVE-2026-23161, CVE-2026-23162, CVE-2026-23163, CVE-2026-23164, CVE-2026-23165, CVE-2026-23166,     CVE-2026-23167, CVE-2026-23168, CVE-2026-23169, CVE-2026-23170, CVE-2026-23171, CVE-2026-23172,     CVE-2026-23173, CVE-2026-23212, CVE-2026-31405, CVE-2026-31414, CVE-2026-31444, CVE-2026-31501,     CVE-2026-31589, CVE-2026-31633, CVE-2026-31636, CVE-2026-31705, CVE-2026-43198, CVE-2026-43379,     CVE-2026-43465, CVE-2026-43499, CVE-2026-46113, CVE-2026-46137, CVE-2026-46242, CVE-2026-46290,     CVE-2026-46317, CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53131,     CVE-2026-53176, CVE-2026-53212, CVE-2026-53225, CVE-2026-53228, CVE-2026-53277, CVE-2026-53359)

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
299319	Linux Distros Unpatched Vulnerability : CVE-2026-23143	Nessus	Misc.	2/17/2026	9/23/2026	medium
340678	Ubuntu 24.04 LTS / Pro Realtime 24.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-8669-1)	Nessus	Ubuntu Local Security Checks	8/26/2026	9/23/2026	high

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