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CVE-2026-58093 is a use-after-free race condition in the FreeBSD kernel tty subsystem's TIOCSCTTY ioctl handler. The handler releases the tty lock while acquiring the process-tree lock. Upon reacquiring the tty lock, it fails to revalidate terminal state and can link a terminal undergoing concurrent destruction to the calling process session.
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No public exploit code observed for this vulnerability.
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5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity use-after-free race condition in FreeBSD tty ioctls that enables local privilege escalation by an unprivileged user.
A high-severity local privilege-escalation race condition in the FreeBSD kernel's TIOCSCTTY ioctl handler. A local unprivileged user can exploit a use-after-free condition involving a concurrently destroyed terminal to gain elevated privileges.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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