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CVE-2026-46322 is a Linux kernel memory-management flaw in the TUN networking path, specifically in tun_xdp_one(). When build_skb() fails after vhost_net_build_xdp() has allocated a page for the frame, the error path sets ret to -ENOMEM and exits without freeing the allocated page. Because tun_sendmsg() discards the per-buffer error and still returns total_len, vhost_tx_batch() follows the success path and does not release the page either. As a result, each build_skb() failure in a batch leaks one page-frag chunk. The fix adds the missing page release on the build_skb() failure path, consistent with the put_page() handling already present in other tun_xdp_one() error exits.
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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.
3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.