Description

Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel before 4.6.3 allows local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that makes sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520

http://lists.openwall.net/netdev/2016/05/15/69

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3

http://www.openwall.com/lists/oss-security/2016/12/03/4

http://www.securityfocus.com/bid/94653

http://www.securitytracker.com/id/1037968

https://access.redhat.com/errata/RHSA-2017:1842

https://access.redhat.com/errata/RHSA-2017:2077

https://access.redhat.com/errata/RHSA-2017:2669

https://bugzilla.redhat.com/show_bug.cgi?id=1401502

https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520

https://source.android.com/security/bulletin/2017-03-01.html

Details

Risk Information

CVSS v2

CVSS v3