CVE-2026-45250

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-45250
The setcred(2) 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 capacity of that buffer, a stack buffer overflow occurs. Because the bounds check on the supplementary groups list occurs after the kernel stack buffer has already been written, an unprivileged local user may trigger the overflow without holding any special privilege. Successful exploitation may allow an attacker to execute arbitrary code in the context of the kernel, allowing an unprivileged local user to gain elevated privileges on the affected system.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/05/21/18
http://www.openwall.com/lists/oss-security/2026/05/21/3
http://www.openwall.com/lists/oss-security/2026/05/22/5
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*
History

22 May 2026, 08:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/22/5 -

22 May 2026, 02:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/21/18 -

21 May 2026, 19:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/05/21/3 -

21 May 2026, 19:00

Type Values Removed Values Added
CPE cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p13:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.3:p12:*:*:*:*:*:*
First Time Freebsd
Freebsd freebsd
References () https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc - () https://security.freebsd.org/advisories/FreeBSD-SA-26:18.setcred.asc - Vendor Advisory

21 May 2026, 14:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8

21 May 2026, 09:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-05-21 09:16

Updated : 2026-05-22 08:16

NVD link : CVE-2026-45250

Mitre link : CVE-2026-45250

CVE.ORG link : CVE-2026-45250

JSON object : View

Products Affected

freebsd

  • freebsd
CWE
CWE-121

Stack-based Buffer Overflow