CVE-2017-18241
Published: 21 March 2018
fs/f2fs/segment.c in the Linux kernel before 4.13 allows local users to cause a denial of service (NULL pointer dereference and panic) by using a noflush_merge option that triggers a NULL value for a flush_cmd_control data structure.
From the Ubuntu Security Team
It was discovered that the f2fs filesystem implementation in the Linux kernel did not handle the noflush_merge mount option correctly. An attacker could use this to cause a denial of service (system crash).
Notes
Author | Note |
---|---|
ppisati |
fixes a case in the F2FS_FS, when the fs is mounted with the 'noflush_merge' option, but support for flush coalition was introduced in: 6b4afdd794783fe515b50838aa36591e3feea990 |
tyhicks |
The affected user base for this issue is likely small since f2fs is not the default filesystem and it is not widely used in Ubuntu |
Priority
Status
Package | Release | Status |
---|---|---|
linux
Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.13.0-11.12)
|
bionic |
Not vulnerable
(4.13.0-16.19)
|
|
cosmic |
Not vulnerable
(4.15.0-20.21)
|
|
trusty |
Not vulnerable
(3.11.0-12.19)
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.4.0-143.169)
|
|
Patches:
Introduced by
6b4afdd794783fe515b50838aa36591e3feea990
|
||
linux-aws
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
cosmic |
Not vulnerable
(4.15.0-1007.7)
|
|
trusty |
Released
(4.4.0-1039.42)
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.4.0-1077.87)
|
|
linux-aws-hwe
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Not vulnerable
(4.15.0-1030.31~16.04.1)
|
|
linux-azure
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
cosmic |
Not vulnerable
(4.15.0-1009.9)
|
|
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.13.0-1005.7)
|
|
linux-azure-edge
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1006.6~18.04.1)
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Not vulnerable
(4.13.0-1003.3)
|
|
linux-euclid
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Ignored
(was needed ESM criteria)
|
|
linux-flo
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
(4.13~rc1)
|
|
xenial |
Ignored
(abandoned)
|
|
linux-gcp
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
cosmic |
Not vulnerable
(4.15.0-1006.6)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.13.0-1002.5)
|
|
linux-gcp-edge
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.18.0-1004.5~18.04.1)
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Does not exist
|
|
linux-gke
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
linux-goldfish
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
(4.13~rc1)
|
|
xenial |
Ignored
(end of life, was needed)
|
|
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
(4.13~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
linux-hwe-edge
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.18.0-13.14~18.04.1)
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
linux-kvm
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
cosmic |
Not vulnerable
(4.15.0-1008.8)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.4.0-1041.47)
|
|
linux-lts-trusty
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~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
(4.13~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-vivid
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Ignored
(end of life, was needs-triage)
|
|
upstream |
Released
(4.13~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
(4.13~rc1)
|
|
xenial |
Does not exist
|
|
linux-lts-xenial
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
trusty |
Released
(4.4.0-143.169~14.04.2)
|
|
upstream |
Released
(4.13~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
(4.13~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
(4.13~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
(4.13~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem
Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Not vulnerable
(4.15.0-1002.3)
|
|
cosmic |
Not vulnerable
(4.15.0-1004.5)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Not vulnerable
(4.13.0-1008.9)
|
|
linux-oracle
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1007.9)
|
cosmic |
Not vulnerable
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Not vulnerable
(4.15.0-1007.9~16.04.1)
|
|
linux-raspi2
Launchpad, Ubuntu, Debian |
artful |
Not vulnerable
(4.13.0-1004.4)
|
bionic |
Not vulnerable
(4.13.0-1005.5)
|
|
cosmic |
Not vulnerable
(4.15.0-1010.11)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.4.0-1104.112)
|
|
linux-snapdragon
Launchpad, Ubuntu, Debian |
artful |
Ignored
(end of life)
|
bionic |
Not vulnerable
|
|
cosmic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.13~rc1)
|
|
xenial |
Released
(4.4.0-1108.113)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4fdf8ba0e5808ba9ad6b44337783bd9935e0982
- https://github.com/torvalds/linux/commit/d4fdf8ba0e5808ba9ad6b44337783bd9935e0982
- https://ubuntu.com/security/notices/USN-3910-1
- https://ubuntu.com/security/notices/USN-3910-2
- https://www.cve.org/CVERecord?id=CVE-2017-18241
- NVD
- Launchpad
- Debian