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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://marc.info/?l=linux-netdev&m=149251041420195 ↗
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682368 ↗
- https://bugzilla.proxmox.com/show_bug.cgi?id=1351 ↗
- http://marc.info/?l=linux-netdev&m=149200742616349 ↗
- http://marc.info/?l=linux-netdev&m=149200746116365 ↗
- http://marc.info/?l=linux-netdev&m=149251041420194 ↗
- http://marc.info/?l=linux-netdev&m=149200746116366 ↗
- http://www.securityfocus.com/bid/97969 ↗