Upstream information

CVE-2016-9754 at MITRE


The ring_buffer_resize function in kernel/trace/ring_buffer.c in the profiling subsystem in the Linux kernel before 4.6.1 mishandles certain integer calculations, which allows local users to gain privileges by writing to the /sys/kernel/debug/tracing/buffer_size_kb file.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database SUSE
Base Score 7.2 6.6
Vector AV:L/AC:L/Au:N/C:C/I:C/A:C AV:L/AC:M/Au:S/C:C/I:C/A:C
Access Vector Local Local
Access Complexity Low Medium
Authentication None Single
Confidentiality Impact Complete Complete
Integrity Impact Complete Complete
Availability Impact Complete Complete
CVSS v3 Scores
  National Vulnerability Database
Base Score 7.8
Vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector Local
Access Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High

Note from the SUSE Security Team

SUSE Linux Enterprise 10 and SUSE Linux Enterprise 11 are not affected. On SUSE Linux Enterprise 12 GA and SP1 the fix is already included in the 3.12.61 and later versions, on SUSE Linux Enterprise 12 SP2 and SP3 the fix is included in 4.4.12 and later versions.

SUSE Bugzilla entries: 1018342 [RESOLVED / WORKSFORME], 1020787 [RESOLVED / WONTFIX]

No SUSE Security Announcements cross referenced.

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Linux Enterprise Desktop 12 SP1 kernel-source Already fixed
SUSE Linux Enterprise Desktop 12 SP2 kernel-source Already fixed
SUSE Linux Enterprise Server 11 SP4 kernel-source Not affected
SUSE Linux Enterprise Server 12 SP1 kernel-source Already fixed
SUSE Linux Enterprise Server 12 SP2 kernel-source Already fixed