CVE-2026-68434

A flaw was found in the Linux kernel's 8250_mid serial driver. This vulnerability occurs due to missing NULL checks before calling setup and exit callbacks, which can result in a NULL pointer dereference. A local attacker could exploit this flaw to cause a kernel oops, leading to a Denial of Service (DoS) on affected Denverton, Ice Lake Xeon D, or Snowridge platforms.

This issue affects Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), and Snowridge (SNR) platforms using the 8250_mid serial driver. Setup and exit callbacks were set to NULL but are dereferenced unconditionally during probe/remove, causing a kernel oops. Other platforms using 8250_mid are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.