CVE-2026-64234: Linux kernel · tty: serial: pch_uart: add check for dma_alloc_coherent()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 8 Nov 2026, 20:49 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 24 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
AI-suggested
A fix has been applied in the Linux kernel to add the missing check and proper resource release. Users should update to the fixed kernel version once available. Patch status is not explicitly confirmed; check the Linux kernel advisories for the specific fixed versions.
Description
A vulnerability in the Linux kernel's pch_uart serial driver was addressed by adding a check for dma_alloc_coherent() failure. This prevents a potential NULL pointer dereference in the dma_handle_rx() function. The fix also ensures proper release of DMA channels and PCI device references if the allocation fails.
References
- git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4 (opens in a new tab)
- git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf (opens in a new tab)
- git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f (opens in a new tab)
- git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82 (opens in a new tab)
- git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8 (opens in a new tab)
- git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59 (opens in a new tab)
- git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863 (opens in a new tab)
- git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43 (opens in a new tab)