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CVE-2018-1091

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Date: March 27, 2018

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.

Language: C

Severity Score

Related Resources (11)

https://access.redhat.com/errata/RHSA-2018:1318
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70
http://openwall.com/lists/oss-security/2018/03/27/4
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
https://nvd.nist.gov/vuln/detail/CVE-2018-1091
https://access.redhat.com/security/cve/CVE-2018-1091
https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70
https://people.canonical.com/~ubuntu-security/cve/CVE-2018-1091
https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2
https://bugzilla.redhat.com/show_bug.cgi?id=1558149
https://www.mend.io/vulnerability-database/CVE-2018-1091

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

Unchecked Error Condition

CWE-391

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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