CVE-2011-4326

The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service (system crash) by sending fragmented IPv6 UDP packets to a bridge device.

• CWE-399

• http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Broken Link
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9cf73ea7ff78f52662c8658d93c226effbbedde
• http://www.openwall.com/lists/oss-security/2011/11/21/10Mailing List
• http://www.securityfocus.com/bid/50751Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=682066Exploit, Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=755584Issue Tracking, Third Party Advisory
• https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbeddePatch, Third Party Advisory
• http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Broken Link
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9cf73ea7ff78f52662c8658d93c226effbbedde
• http://www.openwall.com/lists/oss-security/2011/11/21/10Mailing List
• http://www.securityfocus.com/bid/50751Third Party Advisory, VDB Entry
• https://bugzilla.redhat.com/show_bug.cgi?id=682066Exploit, Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=755584Issue Tracking, Third Party Advisory
• https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbeddePatch, Third Party Advisory

Published

May 17, 2012

Last Modified

Jun 16, 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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