Search criteria
22 vulnerabilities by openbsd
CVE-2026-57589 (GCVE-0-2026-57589)
Vulnerability from cvelistv5 – Published: 2026-06-25 00:33 – Updated: 2026-06-26 03:55
VLAI?
Summary
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().
Severity ?
7.4 (High)
CWE
- CWE-416 - Use After Free
Assigner
References
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CVE-2026-56099 (GCVE-0-2026-56099)
Vulnerability from cvelistv5 – Published: 2026-06-18 19:29 – Updated: 2026-06-23 20:44 X_Open Source
VLAI?
Title
OpenBSD mpls_do_error Kernel Stack Memory Disclosure via MPLS Input
Summary
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.
Severity ?
5.3 (Medium)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
Credits
Argus Systems
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CVE-2026-55706 (GCVE-0-2026-55706)
Vulnerability from cvelistv5 – Published: 2026-06-17 00:53 – Updated: 2026-06-17 14:33
VLAI?
Summary
sppp_pap_input in sys/net/if_spppsubr.c in OpenBSD before 076e2b1 allows authentication bypass via certain zero values for lengths.
Severity ?
5.8 (Medium)
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
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CVE-2026-41285 (GCVE-0-2026-41285)
Vulnerability from cvelistv5 – Published: 2026-04-20 00:00 – Updated: 2026-04-21 13:27
VLAI?
Summary
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.
Severity ?
4.3 (Medium)
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
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CVE-2026-35414 (GCVE-0-2026-35414)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:08 – Updated: 2026-04-02 18:17
VLAI?
Summary
OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.
Severity ?
4.2 (Medium)
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
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CVE-2026-35388 (GCVE-0-2026-35388)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:57 – Updated: 2026-04-02 18:16
VLAI?
Summary
OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.
Severity ?
CWE
- CWE-420 - Unprotected Alternate Channel
Assigner
References
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CVE-2026-35387 (GCVE-0-2026-35387)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:52 – Updated: 2026-04-03 13:07
VLAI?
Summary
OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.
Severity ?
CWE
- CWE-670 - Always-Incorrect Control Flow Implementation
Assigner
References
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CVE-2026-35386 (GCVE-0-2026-35386)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:44 – Updated: 2026-04-03 03:55
VLAI?
Summary
In OpenSSH before 10.3, command execution can occur via shell metacharacters in a username within a command line. This requires a scenario where the username on the command line is untrusted, and also requires a non-default configurations of % in ssh_config.
Severity ?
CWE
- CWE-696 - Incorrect Behavior Order
Assigner
References
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CVE-2026-35385 (GCVE-0-2026-35385)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:30 – Updated: 2026-07-02 12:05
VLAI?
Summary
In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectations, if the download is performed as root with -O (legacy scp protocol) and without -p (preserve mode).
Severity ?
7.5 (High)
CWE
- CWE-281 - Improper Preservation of Permissions
Assigner
References
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CVE-2025-61985 (GCVE-0-2025-61985)
Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-10-06 18:34
VLAI?
Summary
ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used.
Severity ?
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
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CVE-2025-61984 (GCVE-0-2025-61984)
Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2026-02-26 17:48
VLAI?
Summary
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
Severity ?
CWE
- CWE-159 - Improper Handling of Invalid Use of Special Elements
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CVE-2025-32728 (GCVE-0-2025-32728)
Vulnerability from cvelistv5 – Published: 2025-04-10 00:00 – Updated: 2025-05-08 13:11
VLAI?
Summary
In sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.
Severity ?
4.3 (Medium)
CWE
- CWE-440 - Expected Behavior Violation
Assigner
References
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CVE-2025-30334 (GCVE-0-2025-30334)
Vulnerability from cvelistv5 – Published: 2025-03-20 20:39 – Updated: 2025-03-21 15:22
VLAI?
Title
OpenBSD wg(4) kernel crash
Summary
In OpenBSD 7.6 before errata 006 and OpenBSD 7.5 before errata 015, traffic sent over wg(4) could result in kernel crash.
Severity ?
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
Impacted products
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CVE-2024-11149 (GCVE-0-2024-11149)
Vulnerability from cvelistv5 – Published: 2024-12-06 01:56 – Updated: 2024-12-06 16:41
VLAI?
Title
OpenBSD vmm GDTR limits
Summary
In OpenBSD 7.4 before errata 014, vmm(4) did not restore GDTR limits properly on Intel (VMX) CPUs.
Severity ?
Assigner
References
Impacted products
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CVE-2024-10933 (GCVE-0-2024-10933)
Vulnerability from cvelistv5 – Published: 2024-12-05 20:06 – Updated: 2024-12-05 20:40
VLAI?
Title
OpenBSD readdir directory traversal
Summary
In OpenBSD 7.5 before errata 009 and OpenBSD 7.4 before errata 022, exclude any '/' in readdir name validation to avoid unexpected directory traversal on untrusted file systems.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
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CVE-2024-11148 (GCVE-0-2024-11148)
Vulnerability from cvelistv5 – Published: 2024-12-05 19:50 – Updated: 2024-12-06 18:58
VLAI?
Title
OpenBSD httpd(8) null dereference
Summary
In OpenBSD 7.4 before errata 006 and OpenBSD 7.3 before errata 020, httpd(8) is vulnerable to a NULL dereference when handling a malformed fastcgi request.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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CVE-2024-10934 (GCVE-0-2024-10934)
Vulnerability from cvelistv5 – Published: 2024-11-15 19:20 – Updated: 2025-10-02 14:09
VLAI?
Title
OpenBSD NFS double-free vulnerability
Summary
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.
Severity ?
9.8 (Critical)
Assigner
References
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CVE-2021-35000 (GCVE-0-2021-35000)
Vulnerability from cvelistv5 – Published: 2024-05-07 22:54 – Updated: 2024-09-18 18:27
VLAI?
Title
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability
Summary
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
. Was ZDI-CAN-16112.
Severity ?
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
| URL | Tags | ||||
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CVE-2021-34999 (GCVE-0-2021-34999)
Vulnerability from cvelistv5 – Published: 2024-05-07 22:54 – Updated: 2024-09-18 18:19
VLAI?
Title
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability
Summary
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
. Was ZDI-CAN-14540.
Severity ?
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
References
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CVE-2023-52558 (GCVE-0-2023-52558)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:33 – Updated: 2024-11-19 21:42
VLAI?
Title
OpenBSD 7.4 and 7.3 m_split() network buffer kernel crash
Summary
In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.
Severity ?
7.5 (High)
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
Impacted products
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CVE-2023-52557 (GCVE-0-2023-52557)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:14 – Updated: 2024-08-02 23:03
VLAI?
Title
OpenBSD 7.3 invalid l2tp message npppd crash
Summary
In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length.
Severity ?
7.5 (High)
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
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CVE-2023-52556 (GCVE-0-2023-52556)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:08 – Updated: 2024-11-14 19:47
VLAI?
Title
OpenBSD 7.4 pf state race condition kernel crash
Summary
In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.
Severity ?
6.2 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
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