CVE-2020-25669 Information

Description

A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect there is still an alias in sunkbd_reinit causing Use After Free.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html http://www.openwall.com/lists/oss-security/2020/11/20/5 https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html http://www.openwall.com/lists/oss-security/2020/11/05/2 https://www.openwall.com/lists/oss-security/2020/11/05/2 https://www.openwall.com/lists/oss-security/2020/11/20/5 https://security.netapp.com/advisory/ntap-20210702-0006/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8