Description
Multiple integer overflows in the (1) pppol2tp_sendmsg function in net/l2tp/l2tp_ppp.c, and the (2) l2tp_ip_sendmsg function in net/l2tp/l2tp_ip.c, in the PPPoL2TP and IPoL2TP implementations in the Linux kernel before 2.6.36.2 allow local users to cause a denial of service (heap memory corruption and panic) or possibly gain privileges via a crafted sendto call.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | linux-2.6 | 2.6.26-26lenny1 | DSA-2126-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-71.14.1.el6 | RHSA-2011:0007 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 1 | perf +10 | 2.6.33.7-rt29.55.el5rt | RHSA-2011:0330 |
Advisories 3
- RHSA-2011:0007 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2126-1 linux-2.6 - several issues Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2011:0330 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- 43056 third-party-advisory
- SUSE-SA:2011:004 vendor-advisory
- 42801 third-party-advisory
- SUSE-SA:2011:002 vendor-advisory
- [oss-security] 20101124 Re: CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- 42932 third-party-advisory
- RHSA-2011:0007 vendor-advisory
- ADV-2011-0124 vdb-entry
- [netdev] 20101031 [SECURITY] L2TP send buffer allocation size overflows mailing-list
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- [oss-security] 20101124 Re: CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=651892
- SUSE-SA:2011:005 vendor-advisory
- ADV-2011-0375 vdb-entry
- 42890 third-party-advisory
- ADV-2011-0012 vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8acfe468b0384e834a303f08ebc4953d72fb690a
- 44762 vdb-entry
- [oss-security] 20101124 Re: CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- SUSE-SA:2011:008 vendor-advisory
- [oss-security] 20101110 CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- http://xorl.wordpress.com/2010/11/11/cve-2010-4160-linux-kernel-l2tp-integer-overflows/
- [oss-security] 20101124 Re: CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=253eacc070b114c2ec1f81b067d2fed7305467b0
- 43291 third-party-advisory
- [oss-security] 20101110 Re: CVE request: kernel: L2TP send buffer allocation size overflows mailing-list
- ADV-2011-0213 vdb-entry
- [netdev] 20101027 Re: [PATCH 1/4] tipc: Fix bugs in tipc_msg_calc_data_size() mailing-list