Detections
Analytics
CVE-2017-7979
high
Description
The cookie feature in the packet action API implementation in net/sched/act_api.c in the Linux kernel 4.11.x through 4.11-rc7 mishandles the tb nlattr array, which allows local users to cause a denial of service (uninitialized memory access and refcount underflow, and system hang or crash) or possibly have unspecified other impact via "tc filter add" commands in certain contexts. NOTE: this does not affect stable kernels, such as 4.10.x, from kernel.org.
References
https://bugzilla.proxmox.com/show_bug.cgi?id=1351
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368
http://www.securityfocus.com/bid/97969
http://marc.info/?l=linux-netdev&m=149251041420195
http://marc.info/?l=linux-netdev&m=149251041420194
http://marc.info/?l=linux-netdev&m=149200746116366