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CVE-2018-11508

29
FAUCET Score

CVE-2018-11508 is a local information disclosure vulnerability in the Linux kernel, specifically affecting the compat_get_timex function in kernel/compat.c. This flaw allows local users to extract sensitive information from kernel memory via the adjtimex system call, impacting various Linux distributions including Canonical and generic Linux kernels before version 4.16.9. Rated Medium severity (CVSS 5.5), this vulnerability requires local access (AV:L) with low attack complexity (AC:L) and no user interaction (UI:N), leading to high confidentiality impact (C:H) by leaking kernel pointers. There is no integrity or availability impact. While not listed on the CISA KEV catalog and currently inactive on the Hot List, an ExploitDB entry (EDB-46208) exists, indicating public exploit code availability. Despite this, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.16.9CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.72%
Probability of exploitation in next 30 days
EPSS Percentile
75.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
ExploitDB: EDB-46208 · Jan 21, 2019
This CVE's current EPSS score of 0.0172 is in the 99th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt

Vendor Advisories (1)

redhatCVE-2018-11508Low

kernel: Missing initialization in kernel/compat.c:compat_get_timex() allows local attacker to obtain possibly sensitive information via adjtimex

May 11, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
bugs.chromium.org / p/project-zero/issues/detail
ExploitIssue TrackingThird Party Advisory
github.com / torvalds/linux/commit/0a0b98734479aa5b3c671d5190e86273372cab95
PatchThird Party Advisory
usn.ubuntu.com / 3695-1
Third Party Advisory
usn.ubuntu.com / 3695-2
Third Party Advisory
usn.ubuntu.com / 3697-1
Third Party Advisory
usn.ubuntu.com / 3697-2
Third Party Advisory
exploit-db.com / exploits/46208
ExploitThird Party AdvisoryVDB Entry
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.16.9
Release NotesVendor Advisory
securityfocus.com / bid/104292
Third Party AdvisoryVDB Entry