1187723 – (CVE-2020-28097) VUL-1: CVE-2020-28097: kernel-source,kernel-source-azure,kernel-source-rt: The vgacon subsystem contains an out-of-bounds read in vgacon_scrolldelta

Bug 1187723 (CVE-2020-28097) - VUL-1: CVE-2020-28097: kernel-source,kernel-source-azure,kernel-source-rt: The vgacon subsystem contains an out-of-bounds read in vgacon_scrolldelta

Summary: VUL-1: CVE-2020-28097: kernel-source,kernel-source-azure,kernel-source-rt: Th...

Status:	RESOLVED FIXED
Duplicates (1):	1176278 (view as bug list)

Alias:	CVE-2020-28097

Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents (show other bugs)
Version:	unspecified
Hardware:	Other Other

Priority:	P4 - Low Severity: Minor
Target Milestone:	---
Assignee:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/302908/
Whiteboard:	CVSSv3.1:SUSE:CVE-2020-28097:6.2:(AV:...
Keywords:

Depends on:
Blocks:

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Reported:	2021-06-25 14:50 UTC by Gianluca Gabrielli
Modified:	2025-11-07 10:14 UTC (History)
CC List:	4 users (show)

See Also:
Found By:	Security Response Team
Services Priority:
Business Priority:
Blocker:	---
Marketing QA Status:	---
IT Deployment:	---

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Description Gianluca Gabrielli 2021-06-25 14:50:03 UTC

The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software
scrollback. There is a vgacon_scrolldelta out-of-bounds read, aka
CID-973c096f6a85.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-28097
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28097
https://github.com/torvalds/linux/commit/973c096f6a85e5b5f2a295126ba6928d9a6afd45
https://seclists.org/oss-sec/2020/q3/176
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=973c096f6a85e5b5f2a295126ba6928d9a6afd45
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10

Comment 1 Gianluca Gabrielli 2021-06-25 14:51:27 UTC

Affected base branches:
 - SLE15-SP2
 - linux-2.6.32
 - linux-3.0
 - linux-4.12
 - linux-4.4

stable and master base branches already has this patch.

Upstream patch [0].

[0] https://github.com/torvalds/linux/commit/973c096f6a85e5b5f2a295126ba6928d9a6afd45.patch

Comment 3 Takashi Iwai 2021-06-25 15:57:09 UTC

The same issue was reported already in the past in bug 1176278.

Comment 6 Marcus Meissner 2022-01-26 10:18:14 UTC

ECO was approved, so we can disable this feature now.

Please reference
 jsc#SLE-23486 for 12-sp5
and
 jsc#SLE-23485 for 15-sp3 and newer.

Comment 7 Takashi Iwai 2022-01-31 12:58:22 UTC

Actually I found that it's been already disabled on SLE15-SP3, the upstream fix to remove the option was a part of big update of DRM stack.

So it's only about SLE12-SP5.
I'll update the patch reference for SLE15-SP3, though.

Comment 8 Takashi Iwai 2022-01-31 13:50:41 UTC

... and it turned out that SLE12-SP5 also already had the change, via bsc#1176278.  I updated the patch reference accordingly.

I guess we don't want to change other LTSS branches?

Comment 17 Swamp Workflow Management 2022-02-10 20:24:21 UTC

openSUSE-SU-2022:0363-1: An update that solves 12 vulnerabilities and has 20 fixes is now available.

Category: security (critical)
Bug References: 1154353,1154488,1160634,1176447,1177599,1183405,1185377,1187428,1187723,1188605,1191881,1193096,1193506,1193767,1193802,1193861,1193864,1193867,1194048,1194227,1194291,1194880,1195009,1195062,1195065,1195073,1195183,1195184,1195254,1195267,1195293,1195371
CVE References: CVE-2020-28097,CVE-2021-22600,CVE-2021-39648,CVE-2021-39657,CVE-2021-39685,CVE-2021-4159,CVE-2021-44733,CVE-2021-45095,CVE-2022-0286,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
openSUSE Leap 15.3 (src):    kernel-azure-5.3.18-150300.38.40.4, kernel-source-azure-5.3.18-150300.38.40.4, kernel-syms-azure-5.3.18-150300.38.40.1

Comment 18 Swamp Workflow Management 2022-02-10 20:33:47 UTC

SUSE-SU-2022:0363-1: An update that solves 12 vulnerabilities and has 20 fixes is now available.

Category: security (critical)
Bug References: 1154353,1154488,1160634,1176447,1177599,1183405,1185377,1187428,1187723,1188605,1191881,1193096,1193506,1193767,1193802,1193861,1193864,1193867,1194048,1194227,1194291,1194880,1195009,1195062,1195065,1195073,1195183,1195184,1195254,1195267,1195293,1195371
CVE References: CVE-2020-28097,CVE-2021-22600,CVE-2021-39648,CVE-2021-39657,CVE-2021-39685,CVE-2021-4159,CVE-2021-44733,CVE-2021-45095,CVE-2022-0286,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
SUSE Linux Enterprise Module for Public Cloud 15-SP3 (src):    kernel-azure-5.3.18-150300.38.40.4, kernel-source-azure-5.3.18-150300.38.40.4, kernel-syms-azure-5.3.18-150300.38.40.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 19 Swamp Workflow Management 2022-02-10 20:48:53 UTC

SUSE-SU-2022:0364-1: An update that solves 14 vulnerabilities and has 29 fixes is now available.

Category: security (critical)
Bug References: 1065729,1071995,1082555,1163405,1177599,1183405,1184209,1186207,1186222,1187428,1187723,1188605,1190973,1192729,1193096,1193234,1193235,1193242,1193507,1193660,1193669,1193727,1193767,1193861,1193864,1193927,1194001,1194027,1194227,1194302,1194410,1194493,1194516,1194529,1194814,1194880,1194888,1194965,1194985,1195065,1195073,1195254,1195272
CVE References: CVE-2020-28097,CVE-2021-3564,CVE-2021-39648,CVE-2021-39657,CVE-2021-4083,CVE-2021-4135,CVE-2021-4149,CVE-2021-4197,CVE-2021-4202,CVE-2021-44733,CVE-2022-0322,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
SUSE Linux Enterprise Workstation Extension 12-SP5 (src):    kernel-default-4.12.14-122.110.1
SUSE Linux Enterprise Software Development Kit 12-SP5 (src):    kernel-docs-4.12.14-122.110.2, kernel-obs-build-4.12.14-122.110.1
SUSE Linux Enterprise Server 12-SP5 (src):    kernel-default-4.12.14-122.110.1, kernel-source-4.12.14-122.110.1, kernel-syms-4.12.14-122.110.1
SUSE Linux Enterprise Live Patching 12-SP5 (src):    kernel-default-4.12.14-122.110.1, kgraft-patch-SLE12-SP5_Update_28-1-8.3.2
SUSE Linux Enterprise High Availability 12-SP5 (src):    kernel-default-4.12.14-122.110.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 20 Swamp Workflow Management 2022-02-11 11:20:20 UTC

SUSE-SU-2022:0370-1: An update that solves 11 vulnerabilities and has 29 fixes is now available.

Category: security (critical)
Bug References: 1154353,1154488,1156395,1160634,1176447,1177599,1183405,1185377,1187428,1187723,1188605,1191881,1193096,1193506,1193767,1193802,1193861,1193864,1193867,1194048,1194227,1194291,1194880,1195009,1195062,1195065,1195073,1195183,1195184,1195254,1195267,1195293,1195371,1195476,1195477,1195478,1195479,1195480,1195481,1195482
CVE References: CVE-2020-28097,CVE-2021-22600,CVE-2021-39648,CVE-2021-39657,CVE-2021-39685,CVE-2021-44733,CVE-2021-45095,CVE-2022-0286,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
SUSE Linux Enterprise Workstation Extension 15-SP3 (src):    kernel-default-5.3.18-150300.59.49.1, kernel-preempt-5.3.18-150300.59.49.1
SUSE Linux Enterprise Module for Live Patching 15-SP3 (src):    kernel-default-5.3.18-150300.59.49.1, kernel-livepatch-SLE15-SP3_Update_14-1-150300.7.3.1
SUSE Linux Enterprise Module for Legacy Software 15-SP3 (src):    kernel-default-5.3.18-150300.59.49.1
SUSE Linux Enterprise Module for Development Tools 15-SP3 (src):    kernel-docs-5.3.18-150300.59.49.1, kernel-obs-build-5.3.18-150300.59.49.1, kernel-preempt-5.3.18-150300.59.49.1, kernel-source-5.3.18-150300.59.49.1, kernel-syms-5.3.18-150300.59.49.1
SUSE Linux Enterprise Module for Basesystem 15-SP3 (src):    kernel-64kb-5.3.18-150300.59.49.1, kernel-default-5.3.18-150300.59.49.1, kernel-default-base-5.3.18-150300.59.49.1.150300.18.31.1, kernel-preempt-5.3.18-150300.59.49.1, kernel-source-5.3.18-150300.59.49.1, kernel-zfcpdump-5.3.18-150300.59.49.1
SUSE Linux Enterprise Micro 5.1 (src):    kernel-default-5.3.18-150300.59.49.1, kernel-default-base-5.3.18-150300.59.49.1.150300.18.31.1
SUSE Linux Enterprise High Availability 15-SP3 (src):    kernel-default-5.3.18-150300.59.49.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 21 Swamp Workflow Management 2022-02-11 11:24:28 UTC

openSUSE-SU-2022:0370-1: An update that solves 11 vulnerabilities and has 29 fixes is now available.

Category: security (critical)
Bug References: 1154353,1154488,1156395,1160634,1176447,1177599,1183405,1185377,1187428,1187723,1188605,1191881,1193096,1193506,1193767,1193802,1193861,1193864,1193867,1194048,1194227,1194291,1194880,1195009,1195062,1195065,1195073,1195183,1195184,1195254,1195267,1195293,1195371,1195476,1195477,1195478,1195479,1195480,1195481,1195482
CVE References: CVE-2020-28097,CVE-2021-22600,CVE-2021-39648,CVE-2021-39657,CVE-2021-39685,CVE-2021-44733,CVE-2021-45095,CVE-2022-0286,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
openSUSE Leap 15.4 (src):    dtb-aarch64-5.3.18-150300.59.49.1, kernel-preempt-5.3.18-150300.59.49.1
openSUSE Leap 15.3 (src):    dtb-aarch64-5.3.18-150300.59.49.1, kernel-64kb-5.3.18-150300.59.49.1, kernel-debug-5.3.18-150300.59.49.1, kernel-default-5.3.18-150300.59.49.1, kernel-default-base-5.3.18-150300.59.49.1.150300.18.31.1, kernel-docs-5.3.18-150300.59.49.1, kernel-kvmsmall-5.3.18-150300.59.49.1, kernel-obs-build-5.3.18-150300.59.49.1, kernel-obs-qa-5.3.18-150300.59.49.1, kernel-preempt-5.3.18-150300.59.49.1, kernel-source-5.3.18-150300.59.49.1, kernel-syms-5.3.18-150300.59.49.1, kernel-zfcpdump-5.3.18-150300.59.49.1

Comment 22 Swamp Workflow Management 2022-02-11 11:34:42 UTC

SUSE-SU-2022:0372-1: An update that solves 13 vulnerabilities and has 28 fixes is now available.

Category: security (critical)
Bug References: 1065729,1071995,1082555,1163405,1177599,1183405,1184209,1186207,1186222,1187428,1187723,1188605,1190973,1192729,1193096,1193234,1193235,1193242,1193507,1193660,1193727,1193767,1193861,1193864,1193927,1194027,1194227,1194302,1194410,1194493,1194516,1194529,1194814,1194880,1194888,1194965,1194985,1195065,1195073,1195254,1195272
CVE References: CVE-2020-28097,CVE-2021-3564,CVE-2021-39648,CVE-2021-39657,CVE-2021-4083,CVE-2021-4135,CVE-2021-4197,CVE-2021-4202,CVE-2021-44733,CVE-2022-0322,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942
JIRA References: 
Sources used:
SUSE Linux Enterprise Server 12-SP5 (src):    kernel-azure-4.12.14-16.88.1, kernel-source-azure-4.12.14-16.88.1, kernel-syms-azure-4.12.14-16.88.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 23 Marcus Meissner 2022-02-13 10:51:19 UTC

I currently would not require this for LTSS branches. The ECO covered only active products (12-sp5 , 15-sp3 and 15-sp4)

Comment 26 Takashi Iwai 2022-02-19 08:20:55 UTC

Then all done, reassigned back to security team.

Comment 28 Swamp Workflow Management 2022-02-21 17:22:50 UTC

SUSE-SU-2022:0543-1: An update that solves 9 vulnerabilities and has 29 fixes is now available.

Category: security (critical)
Bug References: 1154353,1154488,1156395,1160634,1176447,1177599,1183405,1185377,1187428,1187723,1188605,1191881,1193096,1193506,1193802,1193861,1193864,1193867,1194048,1194227,1194291,1194880,1195009,1195065,1195073,1195183,1195184,1195254,1195267,1195293,1195371,1195476,1195477,1195478,1195479,1195480,1195481,1195482
CVE References: CVE-2020-28097,CVE-2021-22600,CVE-2021-39648,CVE-2021-39657,CVE-2021-39685,CVE-2021-45095,CVE-2022-0286,CVE-2022-0330,CVE-2022-22942
JIRA References: 
Sources used:
SUSE Linux Enterprise Module for Realtime 15-SP3 (src):    kernel-rt-5.3.18-150300.76.1, kernel-rt_debug-5.3.18-150300.76.1, kernel-source-rt-5.3.18-150300.76.1, kernel-syms-rt-5.3.18-150300.76.1
SUSE Linux Enterprise Micro 5.1 (src):    kernel-rt-5.3.18-150300.76.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 29 Swamp Workflow Management 2022-02-22 20:17:49 UTC

SUSE-SU-2022:0555-1: An update that solves 16 vulnerabilities and has 31 fixes is now available.

Category: security (critical)
Bug References: 1065729,1071995,1082555,1163405,1177599,1183405,1184209,1185377,1186207,1186222,1187428,1187723,1188605,1190973,1192729,1193096,1193234,1193235,1193242,1193507,1193660,1193669,1193727,1193767,1193861,1193864,1193867,1193927,1194001,1194027,1194048,1194227,1194302,1194410,1194493,1194516,1194529,1194814,1194880,1194888,1194965,1194985,1195065,1195073,1195254,1195272,1195612
CVE References: CVE-2020-28097,CVE-2021-3564,CVE-2021-39648,CVE-2021-39657,CVE-2021-4083,CVE-2021-4135,CVE-2021-4149,CVE-2021-4197,CVE-2021-4202,CVE-2021-44733,CVE-2021-45095,CVE-2022-0322,CVE-2022-0330,CVE-2022-0435,CVE-2022-22942,CVE-2022-24448
JIRA References: 
Sources used:
SUSE Linux Enterprise Real Time Extension 12-SP5 (src):    kernel-rt-4.12.14-10.78.1, kernel-rt_debug-4.12.14-10.78.1, kernel-source-rt-4.12.14-10.78.1, kernel-syms-rt-4.12.14-10.78.1

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.

Comment 30 Gabriele Sonnu 2022-04-15 12:49:59 UTC

*** Bug 1176278 has been marked as a duplicate of this bug. ***