setcred

FreeBSD setcred2 — 研究成果 本子目录收集了针对 FreeBSD 14.x 内核中 setcred2 栈缓冲区溢出的文档和可用漏洞利用程序。 漏洞本身在 setcred.txt 中有完整记录。简要说明：kernsetcredcopyinsuppgroups 使用了 sizeofgroups，其中 groups 是 gidt 类型，导致在将数据 copyin 到固定大小的内核栈数组时，步长为 8 字节而非 4 字节。该溢出在任何权限检查之前即可被任何非特权用户触发。 该仓库包含两种可行的利用路径： 无 SMAP / 无 SMEP — exp2lpenosmap.c。通过一...

CVE-2026-45250

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

The vulnerability of the setcred() function in the operating system kernel of FreeBSD allows a perpetrator to execute arbitrary code, increase their privileges, or cause service failures.

The vulnerability of the setcred function in the operating system kernel of FreeBSD is related to buffer overflow in the stack. Exploiting this vulnerability can allow an attacker to execute arbitrary code, increase their privileges, or cause service failures...

CVE-2026-45250

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

CVE-2026-45250

The setcred(2) system call in the FreeBSD kernel is vulnerable to a stack buffer overflow . The vulnerability occurs because the kernel copies a user-supplied list of supplementary groups into a fixed-size kernel stack buffer without validating its length before checking the caller's privilege le...

CVE-2026-45250 Stack buffer overflow via setcred(2)

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

CVE-2026-45250

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

EUVD-2026-31252

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

CVE-2026-45250 Stack buffer overflow via setcred(2)

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

Exploit for CVE-2026-45250

FreeBSD setcred2 — research artifacts This subdirectory col...

FreeBSD 安全漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a security vulnerability in FreeBSD, which stems from the setcred system call. This call copies a user-supplied supplementary group list into a fixed-size kernel stack buffer without verifying the length. This...

FreeBSD : FreeBSD -- Stack buffer overflow via setcred(2) (39728e41-54b5-11f1-8d7a-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 39728e41-54b5-11f1-8d7a-bc241121aa0a advisory. The setcred2 system call is only available to privileged users. However, before the privilege level of...

CVE-2026-45250: Stack-based Buffer Overflow

The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied list exceeds the capaci...

FreeBSD Security Advisory - FreeBSD-SA-26:18.setcred

FreeBSD Security Advisory - The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the...

PT-2026-42398

Name of the Vulnerable Software and Affected Versions FreeBSD versions 14.x Description A stack buffer overflow exists in the setcred2 system call. The issue occurs because a user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer before the privilege level of t...

FreeBSD-SA-26:18.setcred

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-26:18.setcred Security Advisory The FreeBSD Project Topic: Stack buffer overflow via setcred2 Category: core Module: setcred Announced: 2026-05-20 Credits: Ryan...

FreeBSD -- Stack buffer overflow via setcred(2)

Problem Description: The setcred2 system call is only available to privileged users. However, before the privilege level of the caller is checked, the user-supplied list of supplementary groups is copied into a fixed-size kernel stack buffer without first validating its length. If the supplied li...

SUSE CVE-2009-0361

Russ Allbery pam-krb5 before 3.13, as used by libpam-heimdal, su in Solaris 10, and other software, does not properly handle calls to pamsetcred when running setuid, which allows local users to overwrite and change the ownership of arbitrary files by setting the KRB5CCNAME environment variable, a...