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CVE-2018-14615

Publication date 27 July 2018

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

An issue was discovered in the Linux kernel through 4.17.10. There is a buffer overflow in truncate_inline_inode() in fs/f2fs/inline.c when umounting an f2fs image, because a length value may be negative.

From the Ubuntu Security Team

Wen Xu discovered that the f2fs file system implementation in the Linux kernel did not properly validate metadata. An attacker could use this to construct a malicious f2fs image that, when mounted, could cause a denial of service (system crash).

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-58.64
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
linux-aws 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1047.49
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
linux-aws-hwe 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Fixed 4.15.0-1047.49~16.04.1
14.04 LTS trusty Not in release
linux-azure 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 5.0.0-1014.14~18.04.1
16.04 LTS xenial
Fixed 4.15.0-1055.60
14.04 LTS trusty Ignored
linux-azure-edge 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic
Fixed 5.0.0-1014.14~18.04.1
16.04 LTS xenial
Fixed 4.15.0-1055.60
14.04 LTS trusty Not in release
linux-euclid 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-flo 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-gcp 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1040.42
16.04 LTS xenial
Fixed 4.15.0-1040.42~16.04.1
14.04 LTS trusty Not in release
linux-gcp-edge 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic
Fixed 4.15.0-1040.42
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-gke-4.15 19.04 disco Not in release
18.04 LTS bionic
Fixed 4.15.0-1040.42
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-5.0 19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-goldfish 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-grouper 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-hwe 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic
Fixed 5.0.0-23.24~18.04.1
16.04 LTS xenial
Fixed 4.15.0-58.64~16.04.1
14.04 LTS trusty Not in release
linux-hwe-edge 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-58.64~16.04.1
14.04 LTS trusty Not in release
linux-kvm 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1042.42
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-lts-trusty 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-lts-utopic 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored
linux-lts-vivid 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored
linux-lts-wily 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Ignored
linux-lts-xenial 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
Not affected
linux-maguro 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-mako 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-manta 19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oem 19.04 disco
Fixed 4.15.0-1050.57
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1050.57
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-oracle 19.04 disco
Fixed 5.0.0-1004.8
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1021.23
16.04 LTS xenial
Fixed 4.15.0-1021.23~16.04.1
14.04 LTS trusty Not in release
linux-raspi2 19.04 disco
Not affected
18.10 cosmic Ignored
18.04 LTS bionic
Fixed 4.15.0-1043.46
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-snapdragon 19.04 disco
Not affected
18.10 cosmic Not in release
18.04 LTS bionic
Fixed 4.15.0-1060.66
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

Notes

sbeattie

f2fs tree fix w/commit "f2fs: fix to do sanity check with i_extra_isize"

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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H