CVE-2018-17182
Published: 19 September 2018
An issue was discovered in the Linux kernel through 4.18.8. The vmacache_flush_all function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations.
From the Ubuntu Security Team
Jann Horn discovered that the vmacache subsystem did not properly handle sequence number overflows, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
Notes
| Author | Note |
|---|---|
| sbeattie | as of 2018-09-26, fixes for this issue are applied to all kernels uploaded to RELEASE-proposed today. and should be released around Monday, Oct 1, 2018. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-36.39)
|
| cosmic |
Not vulnerable
(4.18.0-9.10)
|
|
| trusty |
Not vulnerable
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-137.163)
|
|
|
Patches: Introduced by 6b4ebc3a9078c5b7b8c4cf495a0b1d2d0e0bfe7a |
||
|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1023.23)
|
| cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
| trusty |
Released
(4.4.0-1031.34)
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1069.79)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1025.26)
|
| cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Released
(4.15.0-1030.31~14.04.1)
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-1025.26~16.04.1)
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.4~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-1025.26)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(was needed ESM criteria)
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1021.22)
|
| cosmic |
Not vulnerable
(4.18.0-1002.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-1021.22~16.04.1)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(end of life)
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-36.39~16.04.1)
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-11.12~18.04.1)
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.15.0-36.39~16.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1023.23)
|
| cosmic |
Not vulnerable
(4.18.0-1003.3)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1035.41)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Released
(4.4.0-137.163~14.04.1)
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(abandoned)
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1021.24)
|
| cosmic |
Not vulnerable
(4.15.0-1021.24)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1024.26)
|
| cosmic |
Not vulnerable
(4.18.0-1005.7)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1098.106)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| cosmic |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.19~rc4)
|
|
| xenial |
Released
(4.4.0-1102.107)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://googleprojectzero.blogspot.com/2018/09/a-cache-invalidation-bug-in-linux.html
- https://ubuntu.com/security/notices/USN-3776-1
- https://ubuntu.com/security/notices/USN-3776-2
- https://ubuntu.com/security/notices/USN-3777-1
- https://ubuntu.com/security/notices/USN-3777-2
- https://ubuntu.com/security/notices/USN-3777-3
- https://www.cve.org/CVERecord?id=CVE-2018-17182
- NVD
- Launchpad
- Debian