CVE-2018-12232
Published: 12 June 2018
In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
From the Ubuntu Security Team
Shankara Pailoor discovered that a race condition existed in the socket handling code in the Linux kernel. A local attacker could use this to cause a denial of service (system crash).
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Released
(4.15.0-33.36)
|
|
| trusty |
Not vulnerable
|
|
| xenial |
Not vulnerable
|
|
| artful |
Ignored
(end of life)
|
|
| cosmic |
Not vulnerable
(4.17.0-6.7)
|
|
|
Patches: Introduced by 86741ec25462e4c8cdce6df2f41ead05568c7d5e |
||
|
linux-aws Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Released
(4.15.0-1020.20)
|
|
| trusty |
Not vulnerable
|
|
| xenial |
Not vulnerable
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1020.20)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Released
(4.15.0-1022.23)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
| xenial |
Released
(4.15.0-1022.22~16.04.1)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Not vulnerable
(4.18.0-1003.3~18.04.1)
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Released
(4.15.0-1022.23)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Released
(4.15.0-1020.20)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1020.20)
|
|
| trusty |
Does not exist
|
|
| xenial |
Not vulnerable
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Does not exist
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
upstream |
Released
(4.18~rc1)
|
| bionic |
Released
(4.15.0-1017.20)
|
|
| artful |
Does not exist
|
|
| cosmic |
Not vulnerable
(4.15.0-1017.20)
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
trusty |
Does not exist
(trusty was ignored [abandoned])
|
| xenial |
Ignored
(end of life, was needs-triage)
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| bionic |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
trusty |
Does not exist
(trusty was ignored [abandoned])
|
| xenial |
Ignored
(abandoned)
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| bionic |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| xenial |
Released
(4.15.0-33.36~16.04.1)
|
|
| artful |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| bionic |
Not vulnerable
|
|
| upstream |
Released
(4.18~rc1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| xenial |
Released
(4.15.0-33.36~16.04.1)
|
|
| artful |
Does not exist
|
|
| bionic |
Not vulnerable
(4.18.0-11.12~18.04.1)
|
|
| cosmic |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Released
(4.15.0-1018.19)
|
|
| cosmic |
Not vulnerable
(4.15.0-1018.19)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Released
(4.15.0-1018.19~16.04.2)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Not vulnerable
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
| bionic |
Does not exist
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
| bionic |
Released
(4.15.0-1021.23)
|
|
| cosmic |
Not vulnerable
(4.15.0-1021.23)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Not vulnerable
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
| bionic |
Not vulnerable
|
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.18~rc1)
|
|
| xenial |
Not vulnerable
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12232
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14
- https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14
- https://lkml.org/lkml/2018/6/5/14
- https://patchwork.ozlabs.org/patch/926519/
- https://ubuntu.com/security/notices/USN-3752-1
- https://ubuntu.com/security/notices/USN-3752-2
- https://ubuntu.com/security/notices/USN-3752-3
- NVD
- Launchpad
- Debian