What is CVE-2023-54255?

CVE-2023-54255 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 3.5 onward and patched in 4.14.322, 4.19.291, 5.4.251 and others. CVE-2023-54255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-54255?

CVE-2023-54255 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-54255?

Yes, CVE-2023-54255 has been patched. Fixed versions include 4.14.322, 4.19.291, 5.4.251 and others. If you are running Linux kernel 3.5 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-54255 actively exploited?

CVE-2023-54255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-54255

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.

Package Linux Kernel

Published 2025-12-30

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 3.5 and later are affected. Fixed in 4.14.322, 4.19.291, 5.4.251, 5.10.188, 5.15.121, 6.1.39, 6.4.4, 6.5 and their respective stable series.

Affected from

≥ 3.5

Fixed in

✓ 4.14.322 4.14.x ✓ 4.19.291 4.19.x ✓ 5.4.251 5.4.x ✓ 5.10.188 5.10.x ✓ 5.15.121 5.15.x ✓ 6.1.39 6.1.x ✓ 6.4.4 6.4.x ✓ 6.5

References

The following references provide additional information about CVE-2023-54255 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/196f6c71905aa384c0177acf194a1144d480333b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/479380acfa63247b5ac62476138f847aefc62692
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4989627157735c1f1619f08e5bc1592418e7c878
Patch

8 patch commits total View all on NVD

Frequently asked questions

What is CVE-2023-54255?

CVE-2023-54255 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.5 onward and has been patched in 4.14.322, 4.19.291, 5.4.251 and others. CVE-2023-54255 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-54255?

Yes — CVE-2023-54255 has been patched. Fixed versions include 4.14.322, 4.19.291, 5.4.251 and others. If you are running Linux kernel 3.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-54255 actively exploited?

No — CVE-2023-54255 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.