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FatGid: FreeBSD 14.x kernel local privilege escalation
A critical stack buffer overflow vulnerability dubbed FatGid exists in the setcred(2) system call of FreeBSD 14.x kernels, caused by a sizeof type error, allowing unprivileged local users to trigger kernel panics or achieve full local privilege escalation. The flaw was silently patched in FreeBSD's main development branch in November 2025 but has not been backported to stable 14.x releases including 14.4-RELEASE, while FreeBSD 15.0 is also vulnerable but only susceptible to kernel panics via the bug as of publication.
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0- First seen
- May 21, 2026, 8:15 PM
- Last updated
- May 22, 2026, 12:11 AM
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FatGid: FreeBSD 14.x kernel local privilege escalation is currently shaped by signals from 1 source platforms. This page organizes AI analysis summaries, 1 timeline events, and 0 relationship edges so search engines and AI systems can understand the topic's factual basis and propagation arc.
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Keywords
7 tagslocal privilege escalationkernel stack buffer overflowFreeBSD vulnerabilitykernel panicunprivileged accesssecurity flawoperating system vulnerability
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1 evidence itemsFatGid: FreeBSD 14.x kernel local privilege escalation
News · 1May 21, 2026, 8:15 PMOpen original source
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FatGid: FreeBSD 14.x kernel local privilege escalation
May 21, 2026, 8:15 PM
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