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CVE-2023-3773 is an out-of-bounds read vulnerability in the Linux kernel XFRM packet-transformation subsystem. Insufficient validation while parsing the XFRMA_MTIMER_THRESH netlink attribute permits a user with CAP_NET_ADMIN to represent an expected four-byte signed integer attribute as empty, causing a four-byte read beyond the attribute boundary in heap memory. The flaw can disclose sensitive kernel heap data to userspace.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel XFRM netlink-attribute parsing flaw allowing a privileged local user to trigger a four-byte out-of-bounds read and potentially disclose heap data.
Linux kernel XFRM netlink attribute out-of-bounds read vulnerability.
Linux kernel XFRM out-of-bounds read of an XFRMA_MTIMER_THRESH netlink attribute.
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.