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CVE-2018-1091

20
FAUCET Score

CVE-2018-1091 describes a denial-of-service vulnerability in the Linux kernel, specifically affecting versions before 4.13.5 on POWER architecture. This flaw allows an unprivileged user to crash a guest kernel during a core dump due to improper handling of transactional memory instructions. The vulnerability has a CVSS score of 5.5 (Medium), indicating a local attack vector with low complexity, requiring low privileges, and resulting in high availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.13.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
0.42%
Probability of exploitation in next 30 days
EPSS Percentile
34.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0042 is in the 89th 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
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-862.2.3.el7
View patch

Vendor Advisories (1)

redhatCVE-2018-1091Moderate

kernel: guest kernel crash during core dump on POWER9 host

Sep 13, 2017

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
openwall.com / lists/oss-security/2018/03/27/4
Mailing ListThird Party Advisory
access.redhat.com / errata/RHSA-2018:1318
access.redhat.com / security/cve/cve-2018-1091
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70
PatchThird Party Advisory
marc.info
PatchThird Party Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.13.5
PatchVendor Advisory