CVE-2026-41285-OpenBSD-v6daemons-go-brrr

CVE-2026-41285: One Packet Kills IPv6 on OpenBSD One crafted ICMPv6 packet from the local network permanently hangs slaacd and/or rad. IPv6 SLAAC address autoconfiguration dies until someone manually restarts the daemon. No auth, no privileges, 18 bytes of ICMPv6 payload. | ---|--- CVE|...

OpenBSD demons slaacd rad DoS

The vulnerability of demons slaacd and rad in the OpenBSD operating system is related to a circularization issue caused by integer overflow. Exploiting this vulnerability allows an attacker to cause service failures remotely...

CVE-2026-41285

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

EUVD-2026-23996

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

CVE-2026-41285: Improper Validation of Specified Quantity in Input

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

OpenBSD security vulnerabilities

OpenBSD is a cross-platform, BSD-based UNIX-like operating system developed by the OpenBSD organization in Canada. Versions of OpenBSD 7.8 and earlier contained a security vulnerability caused by the slaacd and rad daemon entering an infinite loop when receiving a specially crafted ICMPv6 neighbo...

CVE-2026-41285

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

PT-2026-33860

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...

CVE-2026-41285

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

CVE-2026-41285

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

CVE-2026-41285

CVE-2026-41285 affects OpenBSD up to version 7.8, specifically the slaacd and rad daemons. The issue is a missing validation for ICMPv6 Neighbor Discovery ND options: when a crafted ND option with length zero is received, an expression nd_opt_len * 8 - 2 can execute without a preceding check, cau...

CVE-2026-41285

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 "ndoptlen 8 - 2" expression with no preceding check for whether ndoptlen is zero...

CVE-2022-27882

slaacd in OpenBSD 6.9 and 7.0 before 2022-03-22 has an integer signedness error and resultant heap-based buffer overflow triggerable by a crafted IPv6 router advertisement. NOTE: privilege separation and pledge can prevent exploitation...

OpenBSD Buffer Overflow Vulnerability

OpenBSD is a cross-platform, BSD-based UNIX-like operating system from the Canadian OpenBSD Openbsd project team. OpenBSD suffers from a buffer overflow vulnerability that can be exploited by an attacker to cause slaacd to crash via specially crafted IPv6 routes...

Vulnerability fixed in OpenBSD slaacd

A vulnerability has been fixed in OpenBSD slaacd. This is a service for IPv6 stateless address autoconfiguration SLAAC. A malicious party could potentially exploit the vulnerability to cause a Denial-of-Service. To do so, the malicious party needs to send a specially prepared router advertisement...

CVE-2022-27882

slaacd in OpenBSD 6.9 and 7.0 before 2022-03-22 has an integer signedness error and resultant heap-based buffer overflow triggerable by a crafted IPv6 router advertisement. NOTE: privilege separation and pledge can prevent exploitation...

CVE-2022-27882

slaacd in OpenBSD 6.9 and 7.0 before 2022-03-22 has an integer signedness error and resultant heap-based buffer overflow triggerable by a crafted IPv6 router advertisement. NOTE: privilege separation and pledge can prevent exploitation...

CVE-2022-27881

engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation...

CVE-2022-27881

engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation...

CVE-2022-27881

engine.c in slaacd in OpenBSD 6.9 and 7.0 before 2022-02-21 has a buffer overflow triggerable by an IPv6 router advertisement with more than seven nameservers. NOTE: privilege separation and pledge can prevent exploitation...