Medium [CVE-2020-14390] flaw was found in the Linux kernel in versions before 5.9-rc6
This medium-severity Red Hat Linux advisory covers CVE-2020-14390 affecting Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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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. Due to this flaw requiring a local user to trigger by using frame buffer fbcon, the impact has been rated as Low.
Red Hat severity: Low — CVSS 5.7 (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-787.
Affected Red Hat products: Red Hat Enterprise Linux 5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise MRG 2. Will not fix / out of support: Red Hat Enterprise Linux 5; Red Hat Enterprise Linux 6; Red Hat Enterprise MRG 2.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel-alt; Red Hat package: kernel-rt.
- < 5.9-rc6
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
Mitigation checklist
- 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.
Official advisory · high-confidence parse· fetched 6 days ago·verify at source
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