CVE-2026-39461
highpriority · track · 0EPSS 0.002 · 7 %ileDEEUUSEPSS · scored 2026-10-27
libcasper(3) communicates with helper processes via UNIX domain sockets, and uses the select(2) system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select(2)'s descriptor set size limit of FD_SETSIZE (1024). An attacker able to cause an application using libcasper(3) to allocate large file descriptors, e.g., by opening many descriptors and executing a program which is not careful to close them upon startup, may trigger stack corruption. If the target application runs with setuid root privileges, this could be used to escalate local privileges.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
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weaknesses
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affected products (16)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1628FreeBSD Project FreeBSD OS: Mehrere SchwachstellenDeutsch2026-05-20csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um seine Privilegien zu erhöhen, um Sicherheitsvorkehrungen zu umgehen, um beliebigen Programmcode mit Administratorrechten auszuführen, und um Informationen offenzulegen.
also known as (3)
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sources
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references (4)
External citations — patches, advisories, analysis.
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