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CVE-2026-49429 is an OpenZFS vulnerability in FreeBSD involving the ZFS "userused" property and the ZFS_IOC_USERSPACE_MANY ioctl. According to the provided advisory context, the flaw is an integer truncation issue that can lead to a kernel heap overflow during handling of userspace accounting data associated with the userused property. A local user who has been delegated the relevant ZFS permission can trigger the vulnerable ioctl path and corrupt kernel heap memory.
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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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OpenZFS vulnerability in handling the ZFS 'userused' property via ZFS_IOC_USERSPACE_MANY.
An OpenZFS vulnerability in FreeBSD related to handling of the ZFS 'userused' property through the ZFS_IOC_USERSPACE_MANY ioctl.
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.