CVE-2021-33656
MEDIUMopenEuler - Out-of-bounds Write via PIO_FONT ioctl Command
Title source: llmDescription
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
References (4)
Core 4
Core References
Patch, Third Party Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch
Third Party Advisory x_refsource_misc
https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel
Mailing List, Patch, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2022/07/19/3
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
Scores
CVSS v3
6.8
EPSS
0.0003
EPSS Percentile
9.0%
Attack Vector
PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (3)
debian/debian_linux
10.0
linux/linux_kernel
< 5.10.127
openatom/openeuler
20.03 (3 CPE variants)
Published
Jul 18, 2022
Tracked Since
Feb 18, 2026