CVE-2026-43149

kernel: net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · May 6, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's fsl_ucc_hdlc module. The uhdlc_memclean() function incorrectly deallocates memory by calling dma_free_coherent() twice for buffers that were allocated as a single contiguous block. This improper memory handling may lead to a denial of service (DoS) or other unpredictable system behavior due to memory corruption.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-1341 · Multiple Releases of Same Resource or Handle