The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-002747 advisory.

    The Linux Kernel 2.6.32 and later are affected by a denial of service, by flooding the diagnostic port     0x80 an exception can be triggered leading to a kernel panic.

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

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-000636 advisory.

    The Linux Kernel 2.6.32 and later are affected by a denial of service, by flooding the diagnostic port     0x80 an exception can be triggered leading to a kernel panic.

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

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

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2017-5754     Multiple researchers have discovered a vulnerability in     Intel processors, enabling an attacker controlling an     unprivileged process to read memory from arbitrary     addresses, including from the kernel and all other     processes running on the system.

  This specific attack has been named Meltdown and is addressed in the   Linux kernel for the Intel x86-64 architecture by a patch set named   Kernel Page Table Isolation, enforcing a near complete separation of   the kernel and userspace address maps and preventing the attack.
  This solution might have a performance impact, and can be disabled   at boot time by passing pti=off to the kernel command line.

  - CVE-2017-8824     Mohamed Ghannam discovered that the DCCP implementation     did not correctly manage resources when a socket is     disconnected and reconnected, potentially leading to a     use-after-free. A local user could use this for denial     of service (crash or data corruption) or possibly for     privilege escalation. On systems that do not already     have the dccp module loaded, this can be mitigated by     disabling it:echo >> /etc/modprobe.d/disable-dccp.conf     install dccp false

  - CVE-2017-15868     Al Viro found that the Bluebooth Network Encapsulation     Protocol (BNEP) implementation did not validate the type     of the second socket passed to the BNEPCONNADD ioctl(),     which could lead to memory corruption. A local user with     the CAP_NET_ADMIN capability can use this for denial of     service (crash or data corruption) or possibly for     privilege escalation.

  - CVE-2017-16538     Andrey Konovalov reported that the dvb-usb-lmedm04 media     driver did not correctly handle some error conditions     during initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash).

  - CVE-2017-16939     Mohamed Ghannam reported (through Beyond Security's     SecuriTeam Secure Disclosure program) that the IPsec     (xfrm) implementation did not correctly handle some     failure cases when dumping policy information through     netlink. A local user with the CAP_NET_ADMIN capability     can use this for denial of service (crash or data     corruption) or possibly for privilege escalation.

  - CVE-2017-17448     Kevin Cernekee discovered that the netfilter subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace, not just the root namespace, to enable     and disable connection tracking helpers. This could lead     to denial of service, violation of network security     policy, or have other impact.

  - CVE-2017-17449     Kevin Cernekee discovered that the netlink subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace to monitor netlink traffic in all net     namespaces, not just those owned by that user namespace.
    This could lead to exposure of sensitive information.

  - CVE-2017-17450     Kevin Cernekee discovered that the xt_osf module allowed     users with the CAP_NET_ADMIN capability in any user     namespace to modify the global OS fingerprint list.

  - CVE-2017-17558     Andrey Konovalov reported that that USB core did not     correctly handle some error conditions during     initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash or memory corruption), or     possibly for privilege escalation.

  - CVE-2017-17741     Dmitry Vyukov reported that the KVM implementation for     x86 would over-read data from memory when emulating an     MMIO write if the kvm_mmio tracepoint was enabled. A     guest virtual machine might be able to use this to cause     a denial of service (crash).

  - CVE-2017-17805     It was discovered that some implementations of the     Salsa20 block cipher did not correctly handle     zero-length input. A local user could use this to cause     a denial of service (crash) or possibly have other     security impact.

  - CVE-2017-17806     It was discovered that the HMAC implementation could be     used with an underlying hash algorithm that requires a     key, which was not intended. A local user could use this     to cause a denial of service (crash or memory     corruption), or possibly for privilege escalation.

  - CVE-2017-17807     Eric Biggers discovered that the KEYS subsystem lacked a     check for write permission when adding keys to a     process's default keyring. A local user could use this     to cause a denial of service or to obtain sensitive     information.

  - CVE-2017-1000407     Andrew Honig reported that the KVM implementation for     Intel processors allowed direct access to host I/O port     0x80, which is not generally safe. On some systems this     allows a guest VM to cause a denial of service (crash)     of the host.

  - CVE-2017-1000410     Ben Seri reported that the Bluetooth subsystem did not     correctly handle short EFS information elements in L2CAP     messages. An attacker able to communicate over Bluetooth     could use this to obtain sensitive information from the     kernel.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

  - CVE-2017-8824     Mohamed Ghannam discovered that the DCCP implementation     did not correctly manage resources when a socket is     disconnected and reconnected, potentially leading to a     use-after-free. A local user could use this for denial     of service (crash or data corruption) or possibly for     privilege escalation. On systems that do not already     have the dccp module loaded, this can be mitigated by     disabling it:echo >> /etc/modprobe.d/disable-dccp.conf     install dccp false

  - CVE-2017-16538     Andrey Konovalov reported that the dvb-usb-lmedm04 media     driver did not correctly handle some error conditions     during initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash).

  - CVE-2017-16644     Andrey Konovalov reported that the hdpvr media driver     did not correctly handle some error conditions during     initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash).

  - CVE-2017-16995     Jann Horn discovered that the Extended BPF verifier did     not correctly model the behaviour of 32-bit load     instructions. A local user can use this for privilege     escalation.

  - CVE-2017-17448     Kevin Cernekee discovered that the netfilter subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace, not just the root namespace, to enable     and disable connection tracking helpers. This could lead     to denial of service, violation of network security     policy, or have other impact.

  - CVE-2017-17449     Kevin Cernekee discovered that the netlink subsystem     allowed users with the CAP_NET_ADMIN capability in any     user namespace to monitor netlink traffic in all net     namespaces, not just those owned by that user namespace.
    This could lead to exposure of sensitive information.

  - CVE-2017-17450     Kevin Cernekee discovered that the xt_osf module allowed     users with the CAP_NET_ADMIN capability in any user     namespace to modify the global OS fingerprint list.

  - CVE-2017-17558     Andrey Konovalov reported that that USB core did not     correctly handle some error conditions during     initialisation. A physically present user with a     specially designed USB device can use this to cause a     denial of service (crash or memory corruption), or     possibly for privilege escalation.

  - CVE-2017-17712     Mohamed Ghannam discovered a race condition in the IPv4     raw socket implementation. A local user could use this     to obtain sensitive information from the kernel.

  - CVE-2017-17741     Dmitry Vyukov reported that the KVM implementation for     x86 would over-read data from memory when emulating an     MMIO write if the kvm_mmio tracepoint was enabled. A     guest virtual machine might be able to use this to cause     a denial of service (crash).

  - CVE-2017-17805     It was discovered that some implementations of the     Salsa20 block cipher did not correctly handle     zero-length input. A local user could use this to cause     a denial of service (crash) or possibly have other     security impact.

  - CVE-2017-17806     It was discovered that the HMAC implementation could be     used with an underlying hash algorithm that requires a     key, which was not intended. A local user could use this     to cause a denial of service (crash or memory     corruption), or possibly for privilege escalation.

  - CVE-2017-17807     Eric Biggers discovered that the KEYS subsystem lacked a     check for write permission when adding keys to a     process's default keyring. A local user could use this     to cause a denial of service or to obtain sensitive     information.

  - CVE-2017-17862     Alexei Starovoitov discovered that the Extended BPF     verifier ignored unreachable code, even though it would     still be processed by JIT compilers. This could possibly     be used by local users for denial of service. It also     increases the severity of bugs in determining     unreachable code.

  - CVE-2017-17863     Jann Horn discovered that the Extended BPF verifier did     not correctly model pointer arithmetic on the stack     frame pointer. A local user can use this for privilege     escalation.

  - CVE-2017-17864     Jann Horn discovered that the Extended BPF verifier     could fail to detect pointer leaks from conditional     code. A local user could use this to obtain sensitive     information in order to exploit other vulnerabilities.

  - CVE-2017-1000407     Andrew Honig reported that the KVM implementation for     Intel processors allowed direct access to host I/O port     0x80, which is not generally safe. On some systems this     allows a guest VM to cause a denial of service (crash)     of the host.

  - CVE-2017-1000410     Ben Seri reported that the Bluetooth subsystem did not     correctly handle short EFS information elements in L2CAP     messages. An attacker able to communicate over Bluetooth     could use this to obtain sensitive information from the     kernel.

The various problems in the Extended BPF verifier can be mitigated by disabling use of Extended BPF by unprivileged users:sysctl kernel.unprivileged_bpf_disabled=1

Debian disables unprivileged user namespaces by default, but if they are enabled (via the kernel.unprivileged_userns_clone sysctl) then CVE-2017-17448 can be exploited by any local user.

The remote Ubuntu 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3619-1 advisory.

    Jann Horn discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel improperly     performed sign extension in some situations. A local attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2017-16995)

    It was discovered that a race condition leading to a use-after-free vulnerability existed in the ALSA PCM     subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash)     or possibly execute arbitrary code. (CVE-2017-0861)

    It was discovered that the KVM implementation in the Linux kernel allowed passthrough of the diagnostic     I/O port 0x80. An attacker in a guest VM could use this to cause a denial of service (system crash) in the     host OS. (CVE-2017-1000407)

    It was discovered that an information disclosure vulnerability existed in the ACPI implementation of the     Linux kernel. A local attacker could use this to expose sensitive information (kernel memory addresses).
    (CVE-2017-11472)

    It was discovered that a use-after-free vulnerability existed in the network namespaces implementation in     the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2017-15129)

    It was discovered that the Advanced Linux Sound Architecture (ALSA) subsystem in the Linux kernel     contained a use-after-free when handling device removal. A physically proximate attacker could use this to     cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-16528)

    Andrey Konovalov discovered that the usbtest device driver in the Linux kernel did not properly validate     endpoint metadata. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2017-16532)

    Andrey Konovalov discovered that the Conexant cx231xx USB video capture driver in the Linux kernel did not     properly validate interface descriptors. A physically proximate attacker could use this to cause a denial     of service (system crash). (CVE-2017-16536)

    Andrey Konovalov discovered that the SoundGraph iMON USB driver in the Linux kernel did not properly     validate device metadata. A physically proximate attacker could use this to cause a denial of service     (system crash). (CVE-2017-16537)

    Andrey Konovalov discovered that the IMS Passenger Control Unit USB driver in the Linux kernel did not     properly validate device descriptors. A physically proximate attacker could use this to cause a denial of     service (system crash). (CVE-2017-16645)

    Andrey Konovalov discovered that the DiBcom DiB0700 USB DVB driver in the Linux kernel did not properly     handle detach events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2017-16646)

    Andrey Konovalov discovered that the CDC USB Ethernet driver did not properly validate device descriptors.
    A physically proximate attacker could use this to cause a denial of service (system crash).
    (CVE-2017-16649)

    Andrey Konovalov discovered that the QMI WWAN USB driver did not properly validate device descriptors. A     physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16650)

    It was discovered that the USB Virtual Host Controller Interface (VHCI) driver in the Linux kernel     contained an information disclosure vulnerability. A physically proximate attacker could use this to     expose sensitive information (kernel memory). (CVE-2017-16911)

    It was discovered that the USB over IP implementation in the Linux kernel did not validate endpoint     numbers. A remote attacker could use this to cause a denial of service (system crash). (CVE-2017-16912)

    It was discovered that the USB over IP implementation in the Linux kernel did not properly validate     CMD_SUBMIT packets. A remote attacker could use this to cause a denial of service (excessive memory     consumption). (CVE-2017-16913)

    It was discovered that the USB over IP implementation in the Linux kernel contained a NULL pointer     dereference error. A remote attacker could use this to cause a denial of service (system crash).
    (CVE-2017-16914)

    It was discovered that the HugeTLB component of the Linux kernel did not properly handle holes in hugetlb     ranges. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2017-16994)

    It was discovered that the netfilter component of the Linux did not properly restrict access to the     connection tracking helpers list. A local attacker could use this to bypass intended access restrictions.
    (CVE-2017-17448)

    It was discovered that the netlink subsystem in the Linux kernel did not properly restrict observations of     netlink messages to the appropriate net namespace. A local attacker could use this to expose sensitive     information (kernel netlink traffic). (CVE-2017-17449)

    It was discovered that the netfilter passive OS fingerprinting (xt_osf) module did not properly perform     access control checks. A local attacker could improperly modify the system-wide OS fingerprint list.
    (CVE-2017-17450)

    It was discovered that the core USB subsystem in the Linux kernel did not validate the number of     configurations and interfaces in a device. A physically proximate attacker could use this to cause a     denial of service (system crash). (CVE-2017-17558)

    Dmitry Vyukov discovered that the KVM implementation in the Linux kernel contained an out-of-bounds read     when handling memory-mapped I/O. A local attacker could use this to expose sensitive information.
    (CVE-2017-17741)

    It was discovered that the Salsa20 encryption algorithm implementations in the Linux kernel did not     properly handle zero-length inputs. A local attacker could use this to cause a denial of service (system     crash). (CVE-2017-17805)

    It was discovered that the HMAC implementation did not validate the state of the underlying cryptographic     hash algorithm. A local attacker could use this to cause a denial of service (system crash) or possibly     execute arbitrary code. (CVE-2017-17806)

    It was discovered that the keyring implementation in the Linux kernel did not properly check permissions     when a key request was performed on a task's default keyring. A local attacker could use this to add keys     to unauthorized keyrings. (CVE-2017-17807)

    Alexei Starovoitov discovered that the Berkeley Packet Filter (BPF) implementation in the Linux kernel     contained a branch-pruning logic issue around unreachable code. A local attacker could use this to cause a     denial of service. (CVE-2017-17862)

    It was discovered that the parallel cryptography component of the Linux kernel incorrectly freed kernel     memory. A local attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2017-18075)

    It was discovered that a race condition existed in the Device Mapper component of the Linux kernel. A     local attacker could use this to cause a denial of service (system crash). (CVE-2017-18203)

    It was discovered that a race condition existed in the OCFS2 file system implementation in the Linux     kernel. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2017-18204)

    It was discovered that an infinite loop could occur in the madvise(2) implementation in the Linux kernel     in certain circumstances. A local attacker could use this to cause a denial of service (system hang).
    (CVE-2017-18208)

    Andy Lutomirski discovered that the KVM implementation in the Linux kernel was vulnerable to a debug     exception error when single-stepping through a syscall. A local attacker in a non-Linux guest vm could     possibly use this to gain administrative privileges in the guest vm. (CVE-2017-7518)

    It was discovered that the Broadcom NetXtremeII ethernet driver in the Linux kernel did not properly     validate Generic Segment Offload (GSO) packet sizes. An attacker could use this to cause a denial of     service (interface unavailability). (CVE-2018-1000026)

    It was discovered that the Reliable Datagram Socket (RDS) implementation in the Linux kernel contained an     out-of-bounds write during RDMA page allocation. An attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2018-5332)

    Mohamed Ghannam discovered a null pointer dereference in the RDS (Reliable Datagram Sockets) protocol     implementation of the Linux kernel. A local attacker could use this to cause a denial of service (system     crash). (CVE-2018-5333)

     discovered that a race condition existed in loop block device implementation in the Linux     kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2018-5344)

    It was discovered that an integer overflow error existed in the futex implementation in the Linux kernel.
    A local attacker could use this to cause a denial of service (system crash). (CVE-2018-6927)

    It was discovered that a NULL pointer dereference existed in the RDS (Reliable Datagram Sockets) protocol     implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system     crash). (CVE-2018-7492)

    It was discovered that the Broadcom UniMAC MDIO bus controller driver in the Linux kernel did not properly     validate device resources. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2018-8043)

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	名称	产品	系列	发布时间	最近更新时间	严重程度
287171	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-002747)	Nessus	Unity Linux Local Security Checks	2026/1/15	2026/1/16	high
290798	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-000636)	Nessus	Unity Linux Local Security Checks	2026/1/16	2026/1/16	high
105704	Debian DSA-4082-1 : linux - security update (Meltdown)	Nessus	Debian Local Security Checks	2018/1/10	2026/1/13	high
105433	Debian DSA-4073-1 : linux - security update	Nessus	Debian Local Security Checks	2017/12/26	2025/11/11	high
108842	Ubuntu 16.04 LTS : Linux kernel vulnerabilities (USN-3619-1)	Nessus	Ubuntu Local Security Checks	2018/4/5	2024/8/27	high

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