CVE-2023-54255 Details
Description
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.
A vulnerability exists in the Linux kernel's DMA driver for certain SH3, SH4, and SH4A SoCs. These systems can have varying numbers of DMA channels, which may be split between two DMAC modules. The current driver implementation does not properly account for these differences, leading to incorrect channel offset calculations. This flaw can cause kernel panics by disrupting normal operations. The issue arises because the driver fails to accommodate the unique DMA channel configurations of these processors, particularly when channels are distributed across multiple DMAC modules.
Users can upgrade to the latest version of the Linux kernel, where this vulnerability has been addressed. Instructions for downloading the patched version are available on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 30, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/196f6c71905aa384c0177acf194a1144d480333b | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/479380acfa63247b5ac62476138f847aefc62692 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/4989627157735c1f1619f08e5bc1592418e7c878 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/8fb11fa4805699c6b73a9c8a9d45807f9874abe3 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/bca700b48c72f4ffeee977a2ed0eb4a6b4b7b8ad | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/d1c946552af299f4fa85bf7da15e328123771128 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/e82e47584847129a20b8c9f4a1dcde09374fb0e0 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/e9e33faea104381bac80ac79328f0540fc2969f2 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 30, 2025 | New CVE Received | kernel.org |