CVE-2020-28097 : The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software scrol

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.

Published 2021-06-24 12:15:08

Updated 2022-04-06 16:46:33

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-28097

Linux » Linux Kernel
Versions before (<) 5.8.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions
Netapp » Cloud Backup » Version: N/A
cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*
Matching versions
Netapp » H410c Firmware » Version: N/A
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410c » Version: N/A
Netapp » H300s Firmware » Version: N/A
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300s » Version: N/A
Netapp » H500s Firmware » Version: N/A
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500s » Version: N/A
Netapp » H700s Firmware » Version: N/A
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700s » Version: N/A
Netapp » H300e Firmware » Version: N/A
cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H300e » Version: N/A
Netapp » H500e Firmware » Version: N/A
cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H500e » Version: N/A
Netapp » H700e Firmware » Version: N/A
cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H700e » Version: N/A
Netapp » H410s Firmware » Version: N/A
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
Matching versions
When used together with: Netapp » H410s » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2020-28097

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 40 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-28097

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.6	LOW	AV:L/AC:L/Au:N/C:P/I:N/A:P	3.9	4.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: Partial
5.9	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H	0.7	5.2	NIST
Attack Vector: Physical Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: High

CWE ids for CVE-2020-28097

CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-28097

https://github.com/torvalds/linux/commit/973c096f6a85e5b5f2a295126ba6928d9a6afd45

vgacon: remove software scrollback support · torvalds/linux@973c096 · GitHub
Patch;Third Party Advisory
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=973c096f6a85e5b5f2a295126ba6928d9a6afd45

kernel/git/torvalds/linux.git - Linux kernel source tree
Patch;Vendor Advisory
https://seclists.org/oss-sec/2020/q3/176

oss-sec: Linux Kernel: out-of-bounds reading in vgacon_scrolldelta
Exploit;Mailing List;Patch;Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10

Patch;Vendor Advisory

CVEs referencing this url
https://security.netapp.com/advisory/ntap-20210805-0001/

CVE-2020-28097 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory

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Vulnerability Details : CVE-2020-28097

Products affected by CVE-2020-28097

Exploit prediction scoring system (EPSS) score for CVE-2020-28097

CVSS scores for CVE-2020-28097

CWE ids for CVE-2020-28097

References for CVE-2020-28097