CVE-2017-15649 Use after free in n/a
Local attackers can gain privileges via a race condition in the Linux kernel packet fanout implementation leading to use-after-free.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-15649?
CVE-2017-15649 is a high-severity use after free vulnerability in Linux kernel, published on 19 Oct 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
net/packet/af_packet.c in the Linux kernel before 4.13.6 allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free, a different vulnerability than CVE-2017-6346.
Weakness: CWE-362
Which versions are affected by CVE-2017-15649?
It affects 1 product.
Linux distribution packages (4)
kgraft-patch-SLE12_Update_29 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12_Update_30 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12_Update_31 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2-2.1 |
kgraft-patch-SLE12_Update_32 SUSE:Linux Enterprise Server 12-LTSS | All versions | 2-2.1 |
Products include Linux kernel.
How do I fix CVE-2017-15649?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2017-15649 being exploited?
There is no known exploitation of CVE-2017-15649 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2017-15649, GHSA-wjx2-qc46-g62h, SUSE-SU-2017:3315-1, SUSE-SU-2018:0233-1, SUSE-SU-2018:0562-1, SUSE-SU-2018:0664-1 and 1 more.