CVE-2018-1091

MEDIUM

Linux Kernel < 4.13.5 - Denial of Service via Transactional Memory Instructions in Core Dump Path

Title source: llm
STIX 2.1

Description

In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.

References (8)

Core 8
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1558149
Patch, Vendor Advisory x_refsource_confirm
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
Patch, Third Party Advisory x_refsource_confirm
https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2
Third Party Advisory x_refsource_confirm
https://access.redhat.com/security/cve/cve-2018-1091
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1318
Mailing List, Third Party Advisory x_refsource_confirm
http://openwall.com/lists/oss-security/2018/03/27/4

Scores

CVSS v3 5.5
EPSS 0.0042
EPSS Percentile 33.5%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-119 CWE-391
Status published
Products (1)
linux/linux_kernel < 4.13.4
Published Mar 27, 2018
Tracked Since Feb 18, 2026