CVE-2021-33656

Description

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

References

https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch

https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel

http://www.openwall.com/lists/oss-security/2022/07/19/3

https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html

Details