Openbsd: >> Openbsd >> 7.5 Security Vulnerabilities
sys/kern/sysv_sem.c in OpenBSD through 7.9 has a use-after-free allowing local privilege escalation to root. This is a context switch use-after-free after tsleep in sys_semget().
CVSS Score
7.4
EPSS Score
0.001
Published
2026-06-25
OpenBSD before commit 6a23123 (2026-06-18) contains an out-of-bounds read vulnerability in the mpls_do_error function within sys/netmpls/mpls_input.c that allows remote attackers to disclose kernel stack memory by sending crafted MPLS frames with 16 labels and no Bottom-of-Stack bit set.
CVSS Score
6.9
EPSS Score
0.004
Published
2026-06-18
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
CVSS Score
5.8
EPSS Score
0.004
Published
2026-06-17
In OpenBSD through 7.8, the slaacd and rad daemons have an infinite loop when they receive a crafted ICMPv6 Neighbor Discovery (ND) option (over a local network) with length zero, because of an "nd_opt_len * 8 - 2" expression with no preceding check for whether nd_opt_len is zero.
CVSS Score
4.3
EPSS Score
0.002
Published
2026-04-21
In OpenBSD 7.6 before errata 006 and OpenBSD 7.5 before errata 015, traffic sent over wg(4) could result in kernel crash.
CVSS Score
7.1
EPSS Score
0.004
Published
2025-03-20
In OpenBSD 7.5 before errata 008 and OpenBSD 7.4 before errata 021,
avoid possible mbuf double free in NFS client and server implementation, do not use uninitialized variable in error handling of NFS server.
CVSS Score
9.2
EPSS Score
0.004
Published
2024-11-15
Multiple race conditions in the (1) Sudo monitor mode and (2) Sysjail policies in Systrace on NetBSD and OpenBSD allow local users to defeat system call interposition, and consequently bypass access control policy and auditing.
CVSS Score
6.2
EPSS Score
0.009
Published
2007-08-13
OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.
CVSS Score
6.6
EPSS Score
0.003
Published
2006-12-26
Integer overflow in banner/banner.c in FreeBSD, NetBSD, and OpenBSD might allow local users to modify memory via a long banner. NOTE: CVE and multiple third parties dispute this issue. Since banner is not setuid, an exploit would not cross privilege boundaries in normal operations. This issue is not a vulnerability
CVSS Score
4.4
EPSS Score
0.003
Published
2006-12-08
CVS 1.12.x through 1.12.8, and 1.11.x through 1.11.16, does not properly handle malformed "Entry" lines, which prevents a NULL terminator from being used and may lead to a denial of service (crash), modification of critical program data, or arbitrary code execution.
CVSS Score
10.0
EPSS Score
0.04
Published
2004-08-06
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