In the Linux kernel, the following vulnerability has been resolved: batman-adv: reject unrepresentable multicast TVLV offsets The network and transport header fields in struct sk_buff are 16-bit offsets from skb->head, and U16_MAX is reserved as the unset transport header value. batadv_tvlv_call_handler() sets both fields from a received multicast TVLV without checking whether the TVLV end is representable. If the end offset exceeds the field's range, skb_set_transport_header() truncates it so that the transport header precedes the network header. The negative difference is then returned by skb_network_header_len() as a large u32. batadv_mcast_forw_packet() consequently accepts an oversized multicast tracker and accesses memory beyond the skb data. Add skb_set_transport_header_careful(), an offset-aware counterpart to skb_reset_transport_header_careful(), which validates the final head-relative offset before assigning it. Use the new helper in batadv_tvlv_call_handler() and reject unrepresentable TVLVs before setting the network header.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - In the Linux kernel, the following vulnerability has been resolved: batman-adv: reject unrepresentable
    multicast TVLV offsets The network and transport header fields in struct sk_buff are 16-bit offsets from
    skb->head, and U16_MAX is reserved as the unset transport header value. batadv_tvlv_call_handler() sets
    both fields from a received multicast TVLV without checking whether the TVLV end is representable. If the
    end offset exceeds the field's range, skb_set_transport_header() truncates it so that the transport header
    precedes the network header. The negative difference is then returned by skb_network_header_len() as a
    large u32. batadv_mcast_forw_packet() consequently accepts an oversized multicast tracker and accesses
    memory beyond the skb data. Add skb_set_transport_header_careful(), an offset-aware counterpart to
    skb_reset_transport_header_careful(), which validates the final head-relative offset before assigning it.
    Use the new helper in batadv_tvlv_call_handler() and reject unrepresentable TVLVs before setting the
    network header. (CVE-2026-80839)

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

  - batman-adv: reject unrepresentable multicast TVLV offsets The network and transport header fields in     struct sk_buff are 16-bit offsets from skb->head, and U16_MAX is reserved as the unset transport header     value. batadv_tvlv_call_handler() sets both fields from a received multicast TVLV without checking whether     the TVLV end is representable. If the end offset exceeds the field's range, skb_set_transport_header()     truncates it so that the transport header precedes the network header. The negative difference is then     returned by skb_network_header_len() as a large u32. batadv_mcast_forw_packet() consequently accepts an     oversized multicast tracker and accesses memory beyond the skb data. Add     skb_set_transport_header_careful(), an offset-aware counterpart to skb_reset_transport_header_careful(),     which validates the final head-relative offset before assigning it. Use the new helper in     batadv_tvlv_call_handler() and reject unrepresentable TVLVs before setting the network header.
    (CVE-2026-80839)

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

ID	Name	Product	Family	Type	Severity
364137	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-500374)	Nessus	Oracle Linux Local Security Checks	Local	high
362907	Debian dla-4817 : ata-modules-6.12.107+deb12-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
470927	Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 20098.0.0	Tenable Cloud Security	Google COS Security Checks	Local	high
470927	Google: sys-kernel/cchost-kernel-6_18, sys-kernel/csql-kernel-6_18, sys-kernel/lakitu-kernel-6_18, sys-kernel/lakitu-nc-kernel-6_18: security update to 20098.0.0	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
469938	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.448.36	Tenable Cloud Security	Google COS Security Checks	Local	high
469938	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19506.448.36	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
468367	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19216.655.28	Tenable Cloud Security	Google COS Security Checks	Local	high
468367	Google: sys-kernel/cchost-kernel-6_12, sys-kernel/csql-kernel-6_12, sys-kernel/lakitu-kernel-6_12, sys-kernel/lakitu-nc-kernel-6_12: security update to 19216.655.28	Tenable Self-Hosted Container Security	Google COS Security Checks	Local	high
351155	Debian dsa-6528 : ata-modules-6.12.111+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	Local	high
342955	Linux Distros Unpatched Vulnerability : CVE-2026-80839	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-80839

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Tenable Plugins

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