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CVE-2020-25656

Updated on 02 Dec 2020

Severity

4.1 Medium severity

Details

CVSS score
4.1
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

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.

Details

Affected product:
AlmaLinux 8 , Amazon Linux 1 , Amazon Linux 2 , CentOS 6 , CentOS 6 ALT , CentOS 6 ELS , CentOS 6 plus , CentOS 7 , CentOS 7 ALT , CentOS 7 ELS , CentOS 7 plus , CentOS 8 , CentOS 8.4 ELS , CentOS 8.5 ELS , CentOS Stream 8 ELS , CloudLinux 6 ELS , CloudLinux OS 6 , CloudLinux OS 6h , CloudLinux OS 7 , CloudLinux OS 7h , CloudLinux OS 8 , Debian 10 , Debian 10 cloud , Debian 9 , Endurance 6 elrepo , Endurance 7 eig 3.10 , Endurance 7 eig 4.14 , OEL 7 Dell , OpenVZ 6 , Oracle Linux 6 ELS , Oracle Linux 7 , Oracle Linux 8 , Proofpoint , Proxmox VE 5 , Proxmox VE 6 , RHEL 6 , RHEL 7 , RHEL 8 , Rocky Linux 8 , Scientific 6 , Ubuntu 14.04 , Ubuntu 14.04 ESM , Ubuntu 16.04 , Ubuntu 16.04 ELS , Ubuntu 16.04 ESM , Ubuntu 18.04 , Ubuntu 20.04 , Upstream 4.14 , Upstream 4.19 , Upstream 4.4 , Upstream 4.9
Affected packages:
linux @ 4.4.0 (+81 more)
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.

Fixes