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CVE-2026-46099 is a race condition in the Linux kernel IPv6 Segment Routing (seg6) and RPL lightweight-tunnel input paths. After seg6_input_core() or rpl_input() invokes ip6_route_input(), the skb can hold a non-refcounted destination entry. The affected paths then pass that destination to dst_cache_set_ip6(), which unconditionally acquires a reference. A concurrent route-generation change and FIB lookup can invalidate and release the shared per-CPU IPv6 route before the cache operation, leaving the skb with a stale destination pointer. The subsequent reference acquisition can operate on a freed destination object, causing a warning or use-after-free.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific vulnerability identified as CVE-2026-46099 referenced in a Unity Linux security check advisory. The content provides scoring and publication metadata but does not describe the underlying flaw type or affected component.
A Linux kernel IPv6 networking vulnerability involving NOREF dst use in seg6 and RPL lightweight tunnels.
A Linux kernel IPv6 networking vulnerability involving NOREF destination handling in seg6 and RPL lightweight tunnels that can lead to a WARN and use-after-free due to a race condition on PREEMPT_RT systems.
A Linux kernel IPv6 networking vulnerability involving NOREF dst use in seg6 and RPL lwtunnels.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.