7.8

CVE-2018-7738: kernel util-linux

CVSS: 7.8v3.0HighModified
AliasesMGASA-2018-0237SUSE-SU-2018:2066-1SUSE-SU-2018:2071-1
Published 06-03-2018Last modified 13-12-2024
Open JSON

Vulnerability summary

CVE-2018-7738 is a high (CVSS 7.8) vulnerability in kernel util-linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.0 (NVD)
EPSS score
0.43%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-03-2018
    PublishedVulnerability first disclosed.
  2. 13-12-2024
    Last modifiedVulnerability information updated.

Description

In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a different user, as demonstrated by logging in as root and entering umount followed by a tab character for autocompletion.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Suse49 products
  • python-libmount&distro=SUSE Enterprise Storage 4< 2.28-44.18.38
  • python-libmount&distro=SUSE Linux Enterprise Desktop 12 SP3< 2.29.2-3.8.1 | < 2.29.2-3.12.1
  • python-libmount&distro=SUSE Linux Enterprise Server 12 SP2-BCL< 2.28-44.18.38
  • python-libmount&distro=SUSE Linux Enterprise Server 12 SP2-LTSS< 2.28-44.18.38
  • python-libmount&distro=SUSE Linux Enterprise Server 12 SP3< 2.29.2-3.8.1 | < 2.29.2-3.12.1
Debian2 products
  • bash-completionAll versions (No fix recorded)
  • util-linux< 2.31.1-0.5 | < 2.29.2-1+deb9u1
Opensuse2 products
  • python-libmount&distro=openSUSE Leap 15.4< 2.31.1-150000.9.24.1
  • python-libmount&distro=openSUSE Leap 15.5< 2.31.1-150000.9.24.1
Kernel1 product
Mageia1 product
  • util-linux< 2.28.2-2.1.mga6
Ubuntu1 product
  • util-linux< 2.31.1-0.4ubuntu3.7

6 vendors · 56 products

References

28 links
Show all 28 references