Description
The compat_alloc_user_space functions in include/asm/compat.h files in the Linux kernel before 2.6.36-rc4-git2 on 64-bit platforms do not properly allocate the userspace memory required for the 32-bit compatibility layer, which allows local users to gain privileges by leveraging the ability of the compat_mc_getsockopt function (aka the MCAST_MSFILTER getsockopt support) to control a certain length value, related to a "stack pointer underflow" issue, as exploited in the wild in September 2010.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0273.htmlBroken Link
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0278.htmlBroken Link
- http://blog.ksplice.com/2010/09/cve-2010-3081/Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c41d68a513c71e35a14f66d71782d27a79a81ea6
- http://isc.sans.edu/diary.html?storyid=9574Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.htmlMailing List, Third Party Advisory
- http://marc.info/?l=oss-security&m=128461522230211&w=2Mailing List, Patch, Third Party Advisory
- http://secunia.com/advisories/42384Broken Link
- http://secunia.com/advisories/43315Broken Link
- http://sota.gen.nz/compat1/Broken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.36-rc4-git2.logBroken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:214Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:247Broken Link
- http://www.redhat.com/support/errata/RHSA-2010-0758.htmlBroken Link
- http://www.redhat.com/support/errata/RHSA-2010-0842.htmlBroken Link
- http://www.redhat.com/support/errata/RHSA-2010-0882.htmlBroken Link
- http://www.securityfocus.com/archive/1/514938/30/30/threadedThird Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/516397/100/0/threadedThird Party Advisory, VDB Entry
- http://www.vmware.com/security/advisories/VMSA-2010-0017.htmlThird Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0003.htmlThird Party Advisory
- http://www.vupen.com/english/advisories/2010/3083Broken Link
- http://www.vupen.com/english/advisories/2010/3117Broken Link
- http://www.vupen.com/english/advisories/2011/0298Broken Link
- https://access.redhat.com/kb/docs/DOC-40265Exploit, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=634457Issue Tracking, Patch, Third Party Advisory
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0273.htmlBroken Link
- http://archives.neohapsis.com/archives/fulldisclosure/2010-09/0278.htmlBroken Link
- http://blog.ksplice.com/2010/09/cve-2010-3081/Broken Link
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c41d68a513c71e35a14f66d71782d27a79a81ea6
- http://isc.sans.edu/diary.html?storyid=9574Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.htmlMailing List, Third Party Advisory
- http://marc.info/?l=oss-security&m=128461522230211&w=2Mailing List, Patch, Third Party Advisory
- http://secunia.com/advisories/42384Broken Link
- http://secunia.com/advisories/43315Broken Link
- http://sota.gen.nz/compat1/Broken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.36-rc4-git2.logBroken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:214Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:247Broken Link
- http://www.redhat.com/support/errata/RHSA-2010-0758.htmlBroken Link
- http://www.redhat.com/support/errata/RHSA-2010-0842.htmlBroken Link
- http://www.redhat.com/support/errata/RHSA-2010-0882.htmlBroken Link
- http://www.securityfocus.com/archive/1/514938/30/30/threadedThird Party Advisory, VDB Entry
- http://www.securityfocus.com/archive/1/516397/100/0/threadedThird Party Advisory, VDB Entry
- http://www.vmware.com/security/advisories/VMSA-2010-0017.htmlThird Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0003.htmlThird Party Advisory
- http://www.vupen.com/english/advisories/2010/3083Broken Link
- http://www.vupen.com/english/advisories/2010/3117Broken Link
- http://www.vupen.com/english/advisories/2011/0298Broken Link
- https://access.redhat.com/kb/docs/DOC-40265Exploit, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=634457Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Sep 24, 2010
- Last modified
- Jun 16, 2026
- NVD status
- Modified