Vulnerability CVE-2022-48627
Published: 2024-03-02

Description:
In the Linux kernel, the following vulnerability has been resolved:

vt: fix memory overlapping when deleting chars in the buffer

A memory overlapping copy occurs when deleting a long line. This memory
overlapping copy can cause data corruption when scr_memcpyw is optimized
to memcpy because memcpy does not ensure its behavior if the destination
buffer overlaps with the source buffer. The line buffer is not always
broken, because the memcpy utilizes the hardware acceleration, whose
result is not deterministic.

Fix this problem by using replacing the scr_memcpyw with scr_memmovew.

 References:
https://git.kernel.org/stable/c/bfee93c9a6c395f9aa62268f1cedf64999844926
https://git.kernel.org/stable/c/57964a5710252bc82fe22d9fa98c180c58c20244
https://git.kernel.org/stable/c/14d2cc21ca622310babf373e3a8f0b40acfe8265
https://git.kernel.org/stable/c/39cdb68c64d84e71a4a717000b6e5de208ee60cc
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