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CVE-2026-68398 is a use-after-free vulnerability in the Linux kernel PPP-over-L2TP receive path. PPPoL2TP receive processing executes under an RCU read-side critical section and invokes PPP input handling using an internal PPP channel object without acquiring a reference to that separately allocated object. During socket teardown, the channel could be freed directly without an RCU grace period when it was bound but neither attached to a PPP unit nor bridged. A concurrent receive operation could therefore dereference channel memory after it had been freed. The fix defers channel reclamation through an RCU callback, ensuring that in-flight receive-side processing completes before the channel memory is released.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.