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OVSwrap is a local privilege escalation vulnerability in the Linux kernel Open vSwitch datapath. The flaw arises because Open vSwitch generates internal flow actions as Netlink attributes whose nested attribute length field, nla_len, is 16 bits wide. A change that permitted the overall generated sw_flow_actions stream to exceed 64 KiB removed the effective guard that had prevented an individual generated nested action container from exceeding the maximum representable nla_len value. As a result, a nested action such as CLONE or CT can be expanded beyond 65,535 bytes and then closed with a truncated length value. Subsequent dump or teardown logic may then parse a structurally different action stream than the one originally validated, causing bytes inside generated conntrack-related data to be reinterpreted as independent actions. Public reporting indicates this parser desynchronization can be turned into kernel pointer disclosure, kernel memory read, and a targeted corruption primitive, culminating in root code execution on affected systems.
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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.
8 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.