kernel: kernel: buffer over write in vgacon_scroll
Published Sep 15, 2020
6.6
MEDIUMCVSS 3.1
EPSS 0.56%
Description
A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Affected products
- Vendor n/a Product Linux Kernel Defaultn/a
- Version All versions of the Linux kernelStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Linux Kernel | n/a |
|
Configuration 1
- ≤ 5.7.19
- 5.8.0
- 5.8.0
- 5.8.0
- 5.8.0
- 5.8.0
- 5.8.0
Configuration 2
- 7.0
- 8.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-1160.6.1.el7
Fixed · RHSA-2020:5023
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-1160.6.1.rt56.1139.el7
Fixed · RHSA-2020:5026
Red Hat Enterprise Linux 8
kernel-0:4.18.0-193.28.1.el8_2
Fixed · RHSA-2020:4286
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-193.28.1.rt13.77.el8_2
Fixed · RHSA-2020:4289
Red Hat Enterprise Linux 5
kernel
Out of support scope
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-alt
Will not fix
Red Hat Enterprise MRG 2
kernel
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-1160.6.1.el7 | Fixed | RHSA-2020:5023 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-1160.6.1.rt56.1139.el7 | Fixed | RHSA-2020:5026 |
| Red Hat Enterprise Linux 8 | kernel-0:4.18.0-193.28.1.el8_2 | Fixed | RHSA-2020:4286 |
| Red Hat Enterprise Linux 8 | kernel-rt-0:4.18.0-193.28.1.rt13.77.el8_2 | Fixed | RHSA-2020:4289 |
| Red Hat Enterprise Linux 5 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | kernel | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw is rated as a having Moderate impact, because only local user with access to VGA console can trigger it (for example if booting with param "nomodeset").
Red Hat mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.56% (0.00563) | 44.82th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.56% (0.00563) | 45.61th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.01% (0.02008) | 56.41th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.39% (0.03394) | 66.86th | v1 |
| Jan 6, 2022 | 3.39% (0.03394) | 66.54th | v1 |
| Jan 5, 2022 | 0.78% (0.00777) | 51.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.78% (0.00777) | 0.00th | v1 |
References (9)
- https://access.redhat.com/security/cve/CVE-2020-14331 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1858679 x_refsource_MISCIssue TrackingThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.openwall.net/linux-kernel/2020/07/29/234 x_refsource_MISCMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-14331
- https://www.cve.org/CVERecord?id=CVE-2020-14331
- https://www.openwall.com/lists/oss-security/2020/07/28/2 x_refsource_MISCExploitMailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-14331 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1858679 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://lists.openwall.net/linux-kernel/2020/07/29/234 | x_refsource_MISCMailing ListPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-14331 | ||
| https://www.cve.org/CVERecord?id=CVE-2020-14331 | ||
| https://www.openwall.com/lists/oss-security/2020/07/28/2 | x_refsource_MISCExploitMailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.