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CVE-2026-46323 is a Linux kernel networking vulnerability in the Generic Receive Offload (GRO) path. The flaw is in skb_gro_receive(), which could copy or append fragments between a source skb and the GRO skb without checking zerocopy status, specifically the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb does not hold page references for the pages in shinfo->frags. If those fragments are appended to another skb without correcting page reference counts, the kernel can later access freed memory, resulting in a use-after-free condition. The upstream fix changes GRO behavior so that skbs are not merged when either the source skb or the last skb in the GRO chain is zerocopy.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
5 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.