Upstream information

CVE-2020-8835 at MITRE

Description

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 7.2
Vector AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.8 7
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Access Vector Local Local
Access Complexity Low High
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact High High
Integrity Impact High High
Availability Impact High High
CVSSv3 Version 3.1 3.1

Note from the SUSE Security Team

This issue only affects Linux Kernel 5.3 and newer, so SUSE Linux Enterprise Server 15-SP1 and older are not affected. SUSE Linux Enterprise Server 15-SP2 is already fixed.

SUSE Bugzilla entries: 1167722 [RESOLVED / FIXED], 1173755 [RESOLVED / UPSTREAM]

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Please note that this evaluation state might be work in progress, incomplete or outdated.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
HPE Helion OpenStack 8 kernel-source Analysis
SUSE Enterprise Storage 5 kernel-source Analysis
SUSE Linux Enterprise 15-SP1 Module for Basesystem kernel-source Not affected
SUSE Linux Enterprise 15-SP1 Module for Development Tools kernel-source Not affected
SUSE Linux Enterprise 15-SP2 Module for Basesystem kernel-source Already fixed
SUSE Linux Enterprise 15-SP2 Module for Development Tools kernel-source Already fixed
SUSE Linux Enterprise High Performance Computing 12 SP4 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 12 SP5 kernel-source Not affected
SUSE Linux Enterprise High Performance Computing 15 LTSS kernel-source Not affected
SUSE Linux Enterprise Point of Service 11 SP3 kernel-source Analysis
SUSE Linux Enterprise Point of Service Image Server 12 kernel-source Analysis
SUSE Linux Enterprise Server 11 SP1 kernel-source Not affected
SUSE Linux Enterprise Server 11 SP3 kernel-source Not affected
SUSE Linux Enterprise Server 11 SP4 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP1 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP2 BCL kernel-source Not affected
SUSE Linux Enterprise Server 12 SP2 ESPOS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP2 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP3 BCL kernel-source Not affected
SUSE Linux Enterprise Server 12 SP3 ESPOS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP3 LTSS kernel-source Not affected
SUSE Linux Enterprise Server 12 SP4 kernel-source Not affected
SUSE Linux Enterprise Server 12 SP4 ESPOS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP4 LTSS kernel-source Analysis
SUSE Linux Enterprise Server 12 SP5 kernel-source Not affected
SUSE Linux Enterprise Server 15 LTSS kernel-source Not affected
SUSE Linux Enterprise Server ESPOS 15 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP2 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP5 kernel-source Not affected
SUSE Linux Enterprise Server for SAP Applications 15 kernel-source Analysis
SUSE OpenStack Cloud 7 kernel-source Analysis
SUSE OpenStack Cloud 8 kernel-source Analysis
SUSE OpenStack Cloud 9 kernel-source Analysis
SUSE OpenStack Cloud Crowbar 8 kernel-source Analysis
SUSE OpenStack Cloud Crowbar 9 kernel-source Analysis