CVE-2020-36557
MEDIUMLinux Kernel < 5.6.2 - Use-After-Free via VT_DISALLOCATE ioctl Race Condition
Title source: llmDescription
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.
References (2)
Core 2
Core References
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ca4463bf8438b403596edd0ec961ca0d4fbe0220
Patch, Release Notes, Vendor Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.2
Scores
CVSS v3
5.1
EPSS
0.0019
EPSS Percentile
9.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-362
CWE-416
Status
published
Products (1)
linux/linux_kernel
< 5.6.2
Published
Jul 21, 2022
Tracked Since
Feb 18, 2026