A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering i40e_setup_channel() failures, aka CID-27d461333459.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-003793 advisory.

    A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the     Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by     triggering i40e_setup_channel() failures, aka CID-27d461333459.

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-2026-003724 advisory.

    A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the     Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by     triggering i40e_setup_channel() failures, aka CID-27d461333459.

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

  - A memory leak in the i40e_setup_macvlans() function in drivers/net/ethernet/intel/i40e/i40e_main.c in the     Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by     triggering i40e_setup_channel() failures, aka CID-27d461333459. (CVE-2019-19043)

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

The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-4300-1 advisory.

    It was discovered that the KVM implementation in the Linux kernel, when paravirtual TLB flushes are     enabled in guests, the hypervisor in some situations could miss deferred TLB flushes or otherwise     mishandle them. An attacker in a guest VM could use this to expose sensitive information (read memory from     another guest VM). (CVE-2019-3016)

    Paulo Bonzini discovered that the KVM hypervisor implementation in the Linux kernel could improperly let a     nested (level 2) guest access the resources of a parent (level 1) guest in certain situations. An attacker     could use this to expose sensitive information. (CVE-2020-2732)

    It was discovered that the Afatech AF9005 DVB-T USB device driver in the Linux kernel did not properly     deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial     of service (kernel memory exhaustion). (CVE-2019-18809)

    It was discovered that the Intel(R) XL710 Ethernet Controller device driver in the Linux kernel did not     properly deallocate memory in certain error conditions. A local attacker could possibly use this to cause     a denial of service (kernel memory exhaustion). (CVE-2019-19043)

    It was discovered that the RPMSG character device interface in the Linux kernel did not properly     deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial     of service (kernel memory exhaustion). (CVE-2019-19053)

    It was discovered that the Marvell Wi-Fi device driver in the Linux kernel did not properly deallocate     memory in certain error conditions. A local attacker could use this to possibly cause a denial of service     (kernel memory exhaustion). (CVE-2019-19056)

    It was discovered that the Intel(R) Wi-Fi device driver in the Linux kernel device driver in the Linux     kernel did not properly deallocate memory in certain error conditions. A local attacker could possibly use     this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19058, CVE-2019-19059)

    It was discovered that the Serial Peripheral Interface (SPI) driver in the Linux kernel device driver in     the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could     possibly use this to cause a denial of service (kernel memory exhaustion). (CVE-2019-19064)

    It was discovered that the Brocade BFA Fibre Channel device driver in the Linux kernel did not properly     deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial     of service (kernel memory exhaustion). (CVE-2019-19066)

    It was discovered that the Realtek RTL8xxx USB Wi-Fi device driver in the Linux kernel did not properly     deallocate memory in certain error conditions. A local attacker could possibly use this to cause a denial     of service (kernel memory exhaustion). (CVE-2019-19068)

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 5.3.12 update contains a number of important fixes across the tree

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
288758	Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-003793)	Nessus	Unity Linux Local Security Checks	medium
288722	Unity Linux 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-003724)	Nessus	Unity Linux Local Security Checks	medium
243382	Linux Distros Unpatched Vulnerability : CVE-2019-19043	Nessus	Misc.	medium
134658	Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4300-1)	Nessus	Ubuntu Local Security Checks	medium
131334	Fedora 31 : kernel (2019-34a75d7e61)	Nessus	Fedora Local Security Checks	high
131332	Fedora 30 : kernel (2019-021c968423)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2019-19043

medium

Tenable Plugins

medium

medium

medium

medium

high

high