CVE-2026-68434: Linux

EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms Commit b1b4efea05a5 ("serial: 8250_mid: Disable DMA for selected platforms") replaced the dnv_board setup and exit callbacks with PTR_IF(false, ...), which evaluates to NULL. However, the three call sites in mid8250_probe() and mid8250_remove() unconditionally dereference these function pointers without NULL checks, causing a NULL pointer dereference (kernel oops) on any Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), or Snowridge (SNR) platform. Fix this by adding the missing NULL checks before calling the setup and exit callbacks.

Affected products

• Linux Linux: from 5.10.261, before 5.10.266 (fixed in 5.10.266); from 5.15.212, before 5.15.217 (fixed in 5.15.217); from 6.1.178, before 6.1.183 (fixed in 6.1.183); from 6.6.145, before 6.6.148 (fixed in 6.6.148); from 6.12.96, before 6.12.101 (fixed in 6.12.101); from 6.18.39, before 6.18.42 (fixed in 6.18.42); …

Published 2026-08-12. Last modified 2026-08-23.