CVE-2026-68434

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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
https://git.kernel.org/stable/c/4ea933a36a14bec19b71025cdd8407bafbd67ec1
https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e
https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d
https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be
https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56
https://git.kernel.org/stable/c/bdaa8871b53fe9b1730ef64dda2fcd662fd83339
https://git.kernel.org/stable/c/f85a42fb90399dedcf81c146d09c07e4548b1e8c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-12 00:17

Updated : 2026-08-23 13:16

NVD link : CVE-2026-68434

Mitre link : CVE-2026-68434

CVE.ORG link : CVE-2026-68434

JSON object : View

Products Affected

No product.

CWE

No CWE.

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