Loading vulnerability…
CVE-2026-58092 is an improper privilege-management vulnerability in FreeBSD 15.0 and later affecting the mac_do policy module. Following a kernel credential-layout change that moved the primary group ID into a dedicated field, the group_is_primary() function retained logic that treated the first supplementary-group entry as the primary group. When mac_do applies a matching credential-transition rule that changes identity without explicitly specifying a target group, it can assign the resulting credential the first supplementary group ID from the original credential rather than the intended primary group. If the original credential has no supplementary groups, the resulting primary group ID becomes 0, the wheel group.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
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.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A FreeBSD 15.0 mac_do credential-handling flaw in group_is_primary() that can incorrectly assign a process primary group ID. Under specific applicable mac_do rules and an empty supplementary-group list, it can assign group ID 0 (wheel), potentially enabling further root privilege escalation depending on system configuration.
Medium-severity FreeBSD mac_do policy-module flaw in which certain rules can incorrectly assign a process to group ID 0 (wheel), potentially enabling escalation to root depending on configuration.
A FreeBSD 15.0 credential-switching flaw in group_is_primary() used by mac_do transition rules. Under constrained conditions, it can incorrectly assign a process a primary group ID of 0 (wheel), which may enable further privilege escalation to root depending on local rules and configuration.
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.