CVE-2015-2923

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD through 10.1 allows remote attackers to reconfigure a hop-limit setting via a small hop_limit value in a Router Advertisement (RA) message.

• CWE-20

• http://openwall.com/lists/oss-security/2015/04/04/2Mailing List, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fd99094de2b83d1d4c8457f2c83483b2828e75aPatch, Third Party Advisory
• https://lists.freebsd.org/pipermail/freebsd-net/2015-April/041934.htmlMailing List, Vendor Advisory
• https://www.freebsd.org/security/advisories/FreeBSD-SA-15:09.ipv6.ascMitigation, Vendor Advisory
• http://openwall.com/lists/oss-security/2015/04/04/2Mailing List, Third Party Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fd99094de2b83d1d4c8457f2c83483b2828e75aPatch, Third Party Advisory
• https://lists.freebsd.org/pipermail/freebsd-net/2015-April/041934.htmlMailing List, Vendor Advisory
• https://www.freebsd.org/security/advisories/FreeBSD-SA-15:09.ipv6.ascMitigation, Vendor Advisory

Published

Feb 20, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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