Medium 5.5Published Jul 24, 2026

CVE-2026-64234tty: serial: pch_uart: add check for dma_alloc_coherent()

Updated under an hour ago (Oct 28, 2026, 7:23 AM ET)

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Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 3c6a483275f47a2ef7119309ad3d791c10cf30da before 760df81763b391bb5f0dcb0b7597b736da753ae4; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before 5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before daea997bb244aeb50cbb2e5e075fb446a6cf068f; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before 6dd5c0ea139b586ad5a091677056dafd405cfe82; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before d846df2dfbc2469a688833b4cc4f8aa80672bde8; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before 66f8bfea055b23719b4fd6ce207c44de37d82a59; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before d8d53a343ebe74274ca17b1e1993042e99f8c863; from 3c6a483275f47a2ef7119309ad3d791c10cf30da before 6fe472c1bbbe238e91141f7cabc1226e96a60d43	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.38 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35; from 6.19 before 7.0.12; 7.1; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4	patch
https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf	patch
https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f	patch
https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82	patch
https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8	patch
https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59	patch
https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863	patch
https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.