CVE-2018-1091

Name: CVE-2018-1091
Creator: NVD / NIST
Published: 2018-03-27T21:29:00.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.42%

Last modified Jun 17, 2026

CVE-2018-1091 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

0.42%

33.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	<= 4.13.4

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Vendor Advisory
http://openwall.com/lists/oss-security/2018/03/27/4Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1318
https://access.redhat.com/security/cve/cve-2018-1091Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1558149Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Third Party Advisory
https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2Patch, Third Party Advisory
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Vendor Advisory
http://openwall.com/lists/oss-security/2018/03/27/4Mailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1318
https://access.redhat.com/security/cve/cve-2018-1091Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1558149Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70Patch, Third Party Advisory
https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2Patch, Third Party Advisory
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Patch, Vendor Advisory

Timeline

Published: Mar 27, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1091?

How severe is CVE-2018-1091?

Severity scoring for CVE-2018-1091 is pending analysis. The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1091?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1091?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST