Vulnerability DatabaseCVE-2020-36557
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CVE-2020-36557
July 21, 2022
A race condition in the Linux kernel before 5.6.2 between the VT_DISALLOCATE ioctl and closing/opening of ttys could lead to a use-after-free.
Related Resources (5)
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-36557
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2
https://security-tracker.debian.org/tracker/CVE-2020-36557
https://access.redhat.com/security/cve/CVE-2020-36557
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220
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CVSS v4
Base Score:
5.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.1
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362
Use After Free
CWE-416
EPSS
Base Score:
0.01