CVE-2026-64234 PUBLISHED

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

Assigner: Linux
Reserved: 19.07.2026 Published: 24.07.2026 Updated: 24.07.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to 760df81763b391bb5f0dcb0b7597b736da753ae4 (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to 5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to daea997bb244aeb50cbb2e5e075fb446a6cf068f (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to 6dd5c0ea139b586ad5a091677056dafd405cfe82 (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to d846df2dfbc2469a688833b4cc4f8aa80672bde8 (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to 66f8bfea055b23719b4fd6ce207c44de37d82a59 (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to d8d53a343ebe74274ca17b1e1993042e99f8c863 (excl.)
  • affected from 3c6a483275f47a2ef7119309ad3d791c10cf30da to 6fe472c1bbbe238e91141f7cabc1226e96a60d43 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 2.6.38 is affected
  • unaffected from 0 to 2.6.38 (excl.)
  • unaffected from 5.10.259 to 5.10.* (incl.)
  • unaffected from 5.15.210 to 5.15.* (incl.)
  • unaffected from 6.1.176 to 6.1.* (incl.)
  • unaffected from 6.6.143 to 6.6.* (incl.)
  • unaffected from 6.12.93 to 6.12.* (incl.)
  • unaffected from 6.18.35 to 6.18.* (incl.)
  • unaffected from 7.0.12 to 7.0.* (incl.)
  • unaffected from 7.1 to * (incl.)

References