CVE-2023-54255
sh: dma: Fix DMA channel offset calculation
Reported by linux · Published December 30, 2025
In the Linux kernel, the following vulnerability has been resolved: sh: dma: Fix DMA channel offset calculation Various SoCs of the SH3, SH4 and SH4A family, which use this driver, feature a differing number of DMA channels, which can be distributed between up to two DMAC modules. The existing implementation fails to correctly accommodate for all those variations, resulting in wrong channel offset calculations and leading to kernel panics. Rewrite dma_base_addr() in order to properly calculate channel offsets in a DMAC module. Fix dmaor_read_reg() and dmaor_write_reg(), so that the correct DMAC module base is selected for the DMAOR register.
EPSS 0.21% · 11.2th percentile
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 7f47c7189b3e8f19a589f77a3ad169d7b691b582, 7f47c7189b3e8f19a589f77a3ad169d7b691b582, 7f47c7189b3e8f19a589f77a3ad169d7b691b582 |
| Linux | Linux | 3.5, 0, 4.14.322 |
| linux | linux_kernel | 3.5, 3.5, 3.5 |
| Linux | Linux | 7f47c7189b3e8f19a589f77a3ad169d7b691b582, 7f47c7189b3e8f19a589f77a3ad169d7b691b582, 7f47c7189b3e8f19a589f77a3ad169d7b691b582 |
Timeline
- Dec 30, 2025 CVE Published
- Dec 31, 2025 EPSS Score (30 in total, the first dated here)
- Apr 15, 2026 CVE Updated
- Jun 2, 2026 Security Advisory (25 in total, the first dated here)
- Jul 27, 2026 Coalition ESS Score
- Oct 4, 2026 Distribution Patch (24 in total, the first dated here)
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