In the Linux kernel, the following vulnerability has been resolved: vlan: fix skb_under_panic and races when toggling HW VLAN offload Toggling hardware VLAN TX offload (NETIF_F_HW_VLAN_CTAG_TX or NETIF_F_HW_VLAN_STAG_TX) on a lower device invokes vlan_transfer_features(), which dynamically changed vlandev->hard_header_len. This causes two issues: 1. Lockless TX paths (e.g. packet_snd in af_packet.c, ip6_finish_output2) read dev->hard_header_len without holding RTNL lock. Mutating hard_header_len dynamically under RTNL creates a data race where upper layers reserve insufficient headroom based on a stale hard_header_len, resulting in skb_under_panic when vlan_dev_hard_header() is called. 2. In addition, vlan_transfer_features() updated hard_header_len without updating header_ops, causing a mismatch between allocated headroom and header creation. Always setting dev->hard_header_len = real_dev->hard_header_len and dev->needed_headroom = real_dev->needed_headroom + VLAN_HLEN unconditionally ensures: - dev->hard_header_len remains 100% static and immutable at real_dev->hard_header_len, eliminating all dynamic runtime updates and data races on hard_header_len. - Upper layers allocating skbs via LL_RESERVED_SPACE() will always reserve sufficient headroom for software VLAN tag insertion (real_dev->hard_header_len + real_dev->needed_headroom + VLAN_HLEN). - vlandev inherits real_dev->needed_tailroom so underlying trailer/padding/ICV requirements are honored. - AF_PACKET SOCK_RAW network header offsets remain correctly aligned at real_dev->hard_header_len. - vlan_header_ops is used unconditionally. Note to stable teams: Make sure to backport these commits: e16e960d55a4 ("ipvlan: inherit needed_headroom and needed_tailroom from phy_dev") cef51860becd ("macvlan: inherit needed_headroom and needed_tailroom from lowerdev")

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

  - vlan: fix skb_under_panic and races when toggling HW VLAN offload Toggling hardware VLAN TX offload     (NETIF_F_HW_VLAN_CTAG_TX or NETIF_F_HW_VLAN_STAG_TX) on a lower device invokes vlan_transfer_features(),     which dynamically changed vlandev->hard_header_len. This causes two issues: 1. Lockless TX paths (e.g.
    packet_snd in af_packet.c, ip6_finish_output2) read dev->hard_header_len without holding RTNL lock.
    Mutating hard_header_len dynamically under RTNL creates a data race where upper layers reserve     insufficient headroom based on a stale hard_header_len, resulting in skb_under_panic when     vlan_dev_hard_header() is called. 2. In addition, vlan_transfer_features() updated hard_header_len without     updating header_ops, causing a mismatch between allocated headroom and header creation. Always setting     dev->hard_header_len = real_dev->hard_header_len and dev->needed_headroom = real_dev->needed_headroom +     VLAN_HLEN unconditionally ensures: - dev->hard_header_len remains 100% static and immutable at     real_dev->hard_header_len, eliminating all dynamic runtime updates and data races on hard_header_len. -     Upper layers allocating skbs via LL_RESERVED_SPACE() will always reserve sufficient headroom for software     VLAN tag insertion (real_dev->hard_header_len + real_dev->needed_headroom + VLAN_HLEN). - vlandev inherits     real_dev->needed_tailroom so underlying trailer/padding/ICV requirements are honored. - AF_PACKET SOCK_RAW     network header offsets remain correctly aligned at real_dev->hard_header_len. - vlan_header_ops is used     unconditionally. Note to stable teams: Make sure to backport these commits: e16e960d55a4 (ipvlan: inherit     needed_headroom and needed_tailroom from phy_dev) cef51860becd (macvlan: inherit needed_headroom and     needed_tailroom from lowerdev) (CVE-2026-80925)

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

ID	Name	Product	Family	Type	Severity
351155	Debian dsa-6528 : ata-modules-6.12.111+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
344379	Linux Distros Unpatched Vulnerability : CVE-2026-80925	Nessus	Misc.	Local	medium

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CVE-2026-80925

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Tenable Plugins

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medium