Description

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

bus: mhi: host: Add alignment check for event ring read pointer

Though we do check the event ring read pointer by "is_valid_ring_ptr"
to make sure it is in the buffer range, but there is another risk the
pointer may be not aligned. Since we are expecting event ring elements
are 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer
could lead to multiple issues like DoS or ring buffer memory corruption.

So add a alignment check for event ring read pointer.

Classification

CVE ID: CVE-2023-52494

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.83% (scored less or equal to compared to others)

EPSS Date: 2025-02-04 (when was this score calculated)

References

https://git.kernel.org/stable/c/94991728c84f8df54fd9eec9b85855ef9057ea08
https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551
https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010
https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b
https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f

Timeline