CVE-2020-25656

MEDIUM

Linux Kernel < 5.10 - Use-After-Free in Console Subsystem via KDGKBSENT and KDSKBSENT ioctls

Title source: llm
STIX 2.1

Description

A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.

References (6)

Core 6
Core References
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
Exploit, Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1888726
Exploit, Mailing List, Third Party Advisory
https://lkml.org/lkml/2020/10/16/84
Mailing List, Patch, Third Party Advisory
https://lkml.org/lkml/2020/10/29/528

Scores

CVSS v3 4.1
EPSS 0.0002
EPSS Percentile 5.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-416
Status published
Products (6)
debian/debian_linux 9.0
linux/linux_kernel 5.10 rc1
linux/linux_kernel < 5.10
redhat/enterprise_linux 7.0
redhat/enterprise_linux 8.0
starwindsoftware/starwind_virtual_san v8 build12533 (6 CPE variants)
Published Dec 02, 2020
Tracked Since Feb 18, 2026