CVE-2012-2136

The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.

• CWE-20

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccBroken Link
• http://rhn.redhat.com/errata/RHSA-2012-0743.htmlThird Party Advisory, VDB Entry
• http://rhn.redhat.com/errata/RHSA-2012-1087.htmlThird Party Advisory
• http://secunia.com/advisories/50807URL Repurposed
• http://ubuntu.com/usn/usn-1529-1Third Party Advisory
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5Vendor Advisory
• http://www.securityfocus.com/bid/53721Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-1535-1Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=816289Issue Tracking
• https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccExploit, Patch
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccBroken Link
• http://rhn.redhat.com/errata/RHSA-2012-0743.htmlThird Party Advisory, VDB Entry
• http://rhn.redhat.com/errata/RHSA-2012-1087.htmlThird Party Advisory
• http://secunia.com/advisories/50807URL Repurposed
• http://ubuntu.com/usn/usn-1529-1Third Party Advisory
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5Vendor Advisory
• http://www.securityfocus.com/bid/53721Third Party Advisory, VDB Entry
• http://www.ubuntu.com/usn/USN-1535-1Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=816289Issue Tracking
• https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccExploit, Patch

Published

Aug 9, 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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