Out-of-bounds write in kernel
Key facts
- Attack vector
- Local
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · High
- Fix status
- Deferred Red Hat: fix deferred
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
A flaw was found in the Linux kernel in versions before 5.9-rc6. When changing screen size, an out-of-bounds memory write can occur leading to memory corruption or a denial of service. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | kernel | Linux kernel versions before 5.9-rc6 | — | No fix listed | CNA |
- kernel Vendor— Affected Linux kernel versions before 5.9-rc6 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.2.3 to before 5.9.0 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:-:*:*:*:*:*:* | 5.9.0 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:rc1:*:*:*:*:*:* | 5.9.0 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:rc2:*:*:*:*:*:* | 5.9.0 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:rc3:*:*:*:*:*:* | 5.9.0 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:rc4:*:*:*:*:*:* | 5.9.0 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.9.0:rc5:*:*:*:*:*:* | 5.9.0 rc5 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.2.3 to before 5.9.0 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:-:*:*:*:*:*:* Versions 5.9.0 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:rc1:*:*:*:*:*:* Versions 5.9.0 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:rc2:*:*:*:*:*:* Versions 5.9.0 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:rc3:*:*:*:*:*:* Versions 5.9.0 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:rc4:*:*:*:*:*:* Versions 5.9.0 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.9.0:rc5:*:*:*:*:*:* Versions 5.9.0 rc5 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Linux Kernel kernel — openSUSE-SU-2020:1586
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2020-11253 A flaw was found in the Linux kernel before 5.9-rc4.Priority LOW 25
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise MRG 2 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14390
- 2026-10-03 Alias added: GHSA-h8pg-xg8h-5pgp
- 2026-10-08 CISA SSVC decision points changed
References
Sources
- CVE-2020-14390 · CVE Program
- CVE-2020-14390 · NVD
- FIRST EPSS
- GHSA-h8pg-xg8h-5pgp · GitHub Advisory Database · CC BY 4.0
- CVE-2020-14390 · Red Hat security data · CC BY 4.0
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