Description

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

parisc: fix a possible DMA corruption

ARCH_DMA_MINALIGN was defined as 16 - this is too small - it may be
possible that two unrelated 16-byte allocations share a cache line. If
one of these allocations is written using DMA and the other is written
using cached write, the value that was written with DMA may be
corrupted.

This commit changes ARCH_DMA_MINALIGN to be 128 on PA20 and 32 on PA1.1 -
that's the largest possible cache line size.

As different parisc microarchitectures have different cache line size, we
define arch_slab_minalign(), cache_line_size() and
dma_get_cache_alignment() so that the kernel may tune slab cache
parameters dynamically, based on the detected cache line size.

Classification

CVE ID: CVE-2024-44949

CVSS Base Severity: LOW

CVSS Base Score: 0.0

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/00baca74fb5879e5f9034b6156671301f500f8ee
https://git.kernel.org/stable/c/642a0b7453daff0295310774016fcb56d1f5bc7f
https://git.kernel.org/stable/c/533de2f470baac40d3bf622fe631f15231a03c9f
https://git.kernel.org/stable/c/7ae04ba36b381bffe2471eff3a93edced843240f

Timeline