CVE-2026-39461 select(2) file descriptor set overflow causes stack overflow

libcasper3 communicates with helper processes via UNIX domain sockets, and uses the select2 system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select2's descriptor set size limit of FDSETSIZE 1024. An attacker able to cause an...

CVE-2026-39461

A stack corruption vulnerability exists in libcasper(3) on FreeBSD due to a lack of verification that socket descriptors fit within the select(2) system call's FD_SETSIZE limit (1024). An attacker can trigger this by causing an application to allocate a large number of file descriptors, for examp...

FreeBSD : FreeBSD -- select(2) file descriptor set overflow causes stack overflow (90fe1784-54b6-11f1-8d7a-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 90fe1784-54b6-11f1-8d7a-bc241121aa0a advisory. libcasper3 communicates with helper processes via UNIX domain sockets, and uses the select2 system call...

FreeBSD-SA-26:22.libcasper

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:22.libcasper Security Advisory The FreeBSD Project Topic: select2 file descriptor set overflow causes stack overflow Category: core Module: libcasper...

FreeBSD -- select(2) file descriptor set overflow causes stack overflow

Problem Description: libcasper3 communicates with helper processes via UNIX domain sockets, and uses the select2 system call to wait for data to become available. However, it does not verify that its socket descriptor fits within select2's descriptor set size limit of FDSETSIZE 1024. Impact: An...

CVE-2026-39457

The libnv library in FreeBSD is vulnerable to a stack overflow because it fails to verify if a socket descriptor fits within the FD_SETSIZE (1024) limit when using select(2) to wait for data. An attacker can trigger this by forcing an application to allocate large file descriptors, potentially le...

FreeBSD : FreeBSD -- Stack overflow via select() file descriptor set overflow (892fabf5-4435-11f1-bb07-bc241121aa0a)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 892fabf5-4435-11f1-bb07-bc241121aa0a advisory. When exchanging data over a socket, libnv uses select2 to wait for data to arrive. However, it does not...

FreeBSD-SA-26:16.libnv

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:16.libnv Security Advisory The FreeBSD Project Topic: Stack overflow via select file descriptor set overflow Category: core Module: libnv Announced:...

FreeBSD -- Stack overflow via select() file descriptor set overflow

Problem Description: When exchanging data over a socket, libnv uses select2 to wait for data to arrive. However, it does not verify whether the provided socket descriptor fits in select2's file descriptor set size limit of FDSETSIZE 1024. Impact: An attacker who is able to force a libnv applicati...

The vulnerability in the implementation of the select() and FD_SET() functions of the nss-pam-ldapd package allows a attacker to execute arbitrary code or cause a service failure.

The vulnerability of the select and FDSET functions in the nss-pam-ldapd package lies in the overflow of the file descriptor. Exploiting this vulnerability could allow a remote attacker to execute arbitrary code or cause a denial-of-service attack...