The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6446-1 advisory.

    Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle     certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker     in a guest VM could use this to cause a denial of service (host system crash) or possibly execute     arbitrary code. (CVE-2023-34319)

    Bien Pham discovered that the netfiler subsystem in the Linux kernel contained a race condition, leading     to a use-after-free vulnerability. A local user could use this to cause a denial of service (system crash)     or possibly execute arbitrary code. (CVE-2023-4244)

    Kyle Zeng discovered that the networking stack implementation in the Linux kernel did not properly     validate skb object size in certain conditions. An attacker could use this cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2023-42752)

    Kyle Zeng discovered that the netfiler subsystem in the Linux kernel did not properly calculate array     offsets, leading to a out-of-bounds write vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-42753)

    Kyle Zeng discovered that the IPv4 Resource Reservation Protocol (RSVP) classifier implementation in the     Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to cause a     denial of service (system crash). Please note that kernel packet classifier support for RSVP has been     removed to resolve this vulnerability. (CVE-2023-42755)

    Kyle Zeng discovered that the netfilter subsystem in the Linux kernel contained a race condition in IP set     operations in certain situations. A local attacker could use this to cause a denial of service (system     crash). (CVE-2023-42756)

    Bing-Jhong Billy Jheng discovered that the Unix domain socket implementation in the Linux kernel contained     a race condition in certain situations, leading to a use-after-free vulnerability. A local attacker could     use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4622)

    Budimir Markovic discovered that the qdisc implementation in the Linux kernel did not properly validate     inner classes, leading to a use-after-free vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-4623)

    Alex Birnberg discovered that the netfilter subsystem in the Linux kernel did not properly validate     register length, leading to an out-of- bounds write vulnerability. A local attacker could possibly use     this to cause a denial of service (system crash). (CVE-2023-4881)

    It was discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel did not     properly handle network packets in certain conditions, leading to a use after free vulnerability. A local     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-4921)

    Kevin Rich discovered that the netfilter subsystem in the Linux kernel did not properly handle removal of     rules from chain bindings in certain circumstances, leading to a use-after-free vulnerability. A local     attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code.
    (CVE-2023-5197)

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 16.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6439-1 advisory.

    It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash     collisions in connection lookup table. A remote attacker could use this to cause a denial of service     (excessive CPU consumption). (CVE-2023-1206)

    Yu Hao and Weiteng Chen discovered that the Bluetooth HCI UART driver in the Linux kernel contained a race     condition, leading to a null pointer dereference vulnerability. A local attacker could use this to cause a     denial of service (system crash). (CVE-2023-31083)

    Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle     certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker     in a guest VM could use this to cause a denial of service (host system crash) or possibly execute     arbitrary code. (CVE-2023-34319)

    Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the Linux kernel contained a null     pointer dereference vulnerability in some situations. A local privileged attacker could use this to cause     a denial of service (system crash). (CVE-2023-3772)

    Kyle Zeng discovered that the networking stack implementation in the Linux kernel did not properly     validate skb object size in certain conditions. An attacker could use this cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2023-42752)

    Kyle Zeng discovered that the netfiler subsystem in the Linux kernel did not properly calculate array     offsets, leading to a out-of-bounds write vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-42753)

    Kyle Zeng discovered that the IPv4 Resource Reservation Protocol (RSVP) classifier implementation in the     Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to cause a     denial of service (system crash). Please note that kernel packet classifier support for RSVP has been     removed to resolve this vulnerability. (CVE-2023-42755)

    Bing-Jhong Billy Jheng discovered that the Unix domain socket implementation in the Linux kernel contained     a race condition in certain situations, leading to a use-after-free vulnerability. A local attacker could     use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-4622)

    Budimir Markovic discovered that the qdisc implementation in the Linux kernel did not properly validate     inner classes, leading to a use-after-free vulnerability. A local user could use this to cause a denial of     service (system crash) or possibly execute arbitrary code. (CVE-2023-4623)

    Alex Birnberg discovered that the netfilter subsystem in the Linux kernel did not properly validate     register length, leading to an out-of- bounds write vulnerability. A local attacker could possibly use     this to cause a denial of service (system crash). (CVE-2023-4881)

    It was discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel did not     properly handle network packets in certain conditions, leading to a use after free vulnerability. A local     attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2023-4921)

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 Oracle Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-13043 advisory.

    - nvmet-tcp: Fix a possible UAF in queue intialization setup (Sagi Grimberg)  [Orabug: 36028025]     {CVE-2023-5178}
    - x86: KVM: SVM: always update the x2avic msr interception (Maxim Levitsky)  [Orabug: 35857365]     {CVE-2023-5090}
    - netfilter: nf_tables: disallow rule removal from chain binding (Pablo Neira Ayuso) [Orabug: 35865117]     {CVE-2023-5197}
    - netfilter: ipset: Fix race between IPSET_CMD_CREATE and IPSET_CMD_SWAP (Jozsef Kadlecsik) [Orabug:
    35865151] {CVE-2023-42756}
    - netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction (Pablo Neira Ayuso)     [Orabug: 35814389] {CVE-2023-4244}
    - netfilter: nf_tables: adapt set backend to use GC transaction API (Pablo Neira Ayuso) [Orabug: 35814389]     {CVE-2023-4244}
    - net: sched: sch_qfq: Fix UAF in qfq_dequeue() (valis) [Orabug: 35814453] {CVE-2023-4921}
    - igb: set max size RX buffer when store bad packet is enabled (Radoslaw Tyl) [Orabug: 35924095]     {CVE-2023-45871}
    - igmp: limit igmpv3_newpack() packet size to IP_MAX_MTU (Eric Dumazet) [Orabug: 35923998]     {CVE-2023-42752}
    - net/sched: sch_hfsc: Ensure inner classes have fsc curve (Budimir Markovic) [Orabug: 35810514]     {CVE-2023-4623}
    - uek-rpm: Disable kernel support for CONFIG_FIREWIRE in OL9 (Yifei Liu)  [Orabug: 35493648]     {CVE-2023-3159}

Tenable has extracted the preceding description block directly from the Oracle 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.

An update of the linux package has been released.

ID	Name	Product	Family	Published	Updated	Severity
183454	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6446-1)	Nessus	Ubuntu Local Security Checks	10/20/2023	6/3/2026	high
183458	Ubuntu 16.04 ESM : Linux kernel vulnerabilities (USN-6439-1)	Nessus	Ubuntu Local Security Checks	10/20/2023	9/24/2025	high
186962	Oracle Linux 8 / 9 : Unbreakable Enterprise kernel (ELSA-2023-13043)	Nessus	Oracle Linux Local Security Checks	12/15/2023	2/9/2026	high
296481	SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0278-1)	Nessus	SuSE Local Security Checks	1/24/2026	1/24/2026	high
333816	Photon OS 5.0: Linux PHSA-2023-5.0-91-0096	Nessus	PhotonOS Local Security Checks	8/10/2026	8/10/2026	medium

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