Description
The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of versus rval kernel mode values to the fdrelease function, which allows local users to cause a denial of service and trigger a null dereference.
Exploits (1)
exploitdb
WORKING POC
VERIFIED
by Marco Peereboom · cdosopenbsd
https://www.exploit-db.com/exploits/21167
Scores
CVSS v3
5.5
EPSS
0.0038
EPSS Percentile
59.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (2)
openbsd/openbsd
2.9
openbsd/openbsd
3.0
Published
Dec 31, 2001
Tracked Since
Feb 18, 2026