What’s Vulnerable › Vulnerabilities

CVE-2026-43149: net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean() The priv->rx_buffer and priv->tx_buffer are alloc'd together as contiguous buffers in uhdlc_init() but freed as two buffers in uhdlc_memclean(). Change the cleanup to only call dma_free_coherent() once on the whole buffer.

Affected products

• Linux kernel: from 4.8 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16 — fixed in 5.10.252, 5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6

How to fix

Upgrade to a fixed version: Linux kernel 5.10.252, 5.15.202, 6.1.165, 6.12.75. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/011ae5dd84dc9f05eb9b8e1adff44252ac776e7b
• https://git.kernel.org/stable/c/0f85a9655445e67bb0238cfc983d7c383b54938e
• https://git.kernel.org/stable/c/36bd7d5deef936c4e1e3cd341598140e5c14c1d3
• https://git.kernel.org/stable/c/6496fb830cbb741d831225cc4e7e5601c6e42970
• https://git.kernel.org/stable/c/84b932bc9899d43e5829e6cf088b72d73a922b2b
• https://git.kernel.org/stable/c/ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4
• https://git.kernel.org/stable/c/d68994e37ac3b285692559776e0279a88a3b5f8d
• https://git.kernel.org/stable/c/d8a522085d09b30aba1016daf1dddac37c0f0285

Get alerted when CVE-2026-43149 or the next vulnerability affects your stack