Bug 2506828 (CVE-2026-64234) - CVE-2026-64234 kernel: tty: serial: pch_uart: add check for dma_alloc_coherent()
Summary: CVE-2026-64234 kernel: tty: serial: pch_uart: add check for dma_alloc_coherent()
Keywords:
Status: NEW
Alias: CVE-2026-64234
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-24 16:06 UTC by OSIDB Bzimport
Modified: 2026-07-28 12:49 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-24 16:06:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tty: serial: pch_uart: add check for dma_alloc_coherent()

Add a check for dma_alloc_coherent() failure to prevent a potential
NULL pointer dereference in dma_handle_rx(). Properly release DMA
channels and the PCI device reference using a goto ladder if the
allocation fails.
Comment 1 Mauro Matteo Cascella 2026-07-28 12:46:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072440-CVE-2026-64234-ce43@gregkh/T
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