The vulnerability of the macvlan_get_size() function in the drivers/net/macvlan.c module of the Linux kernel’s network device drivers allows a attacker to cause a service failure.

The vulnerability of the macvlangetsize function in the drivers/net/macvlan.c file of the Linux kernel’s network device driver module is related to incorrect calculation of the buffer size. Exploiting this vulnerability could allow an attacker to cause a service failure...

CVE-2026-74743

A flaw was found in the Linux kernel's macvlan component. The macvlan component incorrectly initializes network packet buffer skb headroom and tailroom values, failing to inherit them from the underlying network device. This can occur when the underlying device requires additional space for heade...

EUVD-2026-66573

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

AZL-97782 CVE-2026-74743 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

CVE-2026-74743

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

CVE-2026-74743

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

UBUNTU-CVE-2026-74743

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

CVE-2026-74743 macvlan: inherit needed_headroom and needed_tailroom from lowerdev

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

CVE-2026-74743

CVE-2026-74743 affects the Linux kernel's macvlan network driver. Macvlan devices inherit hard_header_len from the underlying device during initialization but leave needed_headroom and needed_tailroom set to zero. When the lower device requires extra headroom or tailroom (e.g., macsec , ipsec , w...

CVE-2026-74743 macvlan: inherit needed_headroom and needed_tailroom from lowerdev

In the Linux kernel, the following vulnerability has been resolved: macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroom and neededtailroom set to 0. When the underlying lowerdev requires...

Unity Linux 20.1050a Security Update: kernel (UTSA-2026-098976)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-098976 advisory. In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource Add RCU protection on struct...

Linux Distros Unpatched Vulnerability : CVE-2026-74743

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - macvlan: inherit neededheadroom and neededtailroom from lowerdev macvlan devices inherit hardheaderlen from lowerdev during macvlaninit, but leave neededheadroo...

PT-2026-82123

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the macvlan module where devices inherit hard header len from the lower device during macvlan init but fail to inherit needed headroom and needed tailroom, leaving the...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netfilter: Bridge: Multicast packets must be confirmed before being passed up the stack. The conntrack/nfconfirm logic does not handle cloned skb objects that reference the same nfct entry. This issue occurs when dealing with...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net: macvlan: fixed memory leaks in macvlancommonnewlink. kmemleak reports memory leaks in macvlancommonnewlink, as follows: c ip link add link eth0 name .. type macvlan mode source macaddr add kmemleak reports: - A unreferenced...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: macvlan: Enforces a consistent minimal MTU. The macvlan mechanism should enforce a minimal MTU of 68, even when creating a link. This patch avoids the current behavior which could lead to crashes in the IPv6 stack if the link is...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: i40e: The macvlan leak was fixed by synchronizing access to macfilterhash. This patch addresses a macvlan leak issue in the i40e driver, which occurred due to concurrent access to vsi-macfilterhash. The leak occurs when multiple...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: macvlan: fixed a possible Use-after-Allocation UAF in macvlanforwardsource. Added RCU protection for the vlan field in struct macvlansourceentry. Whenever macvlanhashdelsource is called, we must clear the entry-vlan pointer befor...

The vulnerability of the drivers/net/macvlan.c component in the Linux operating system’s kernel allows a hacker to cause a service failure.

The vulnerability of the drivers/net/macvlan.c component in the Linux operating system’s kernel is related to the use of memory after it has been freed. Exploiting this vulnerability can allow an attacker to cause a service failure...

Linux Distros Unpatched Vulnerability : CVE-2026-53013

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - macvlan: fix macvlangetsize not reserving space for IFLAMACVLANBCCUTOFF macvlangetsize does not account for IFLAMACVLANBCCUTOFF, but macvlanfillinfo conditional...