1. Home
  2. Vulnerabilities
  3. CVE-2026-68434
0.0
NA
CVE-2026-68434
serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
Overview
Description

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.

Details
INFO

Published Date :

Aug. 12, 2026, 12:17 a.m.

Last Modified :

Aug. 12, 2026, 12:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-68434 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

No affected product recoded yet

: Total Affected Vendor : 0 | Products : 0
Solution
Add NULL checks to function pointers in serial driver probe and remove functions.
  • Apply the kernel patch to add NULL checks.
  • Update the Linux kernel to a patched version.
  • Test the serial driver functionality after patching.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-68434.

URL Resource
https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-68434 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-68434 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-68434 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-68434 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 12, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '587afb06a5d1dc5092d3d9e9ac3ccf22094d50c6', 'lessThan': '1096397c31f6bffa95e77bdd18fbca085be83e10', 'versionType': 'git'}, {'status': 'affected', 'version': '977855894bca4b87afa50d21e3f3e85a5a0e901f', 'lessThan': '600dcd548fb2b00a69f447684f52ba45d5a3540e', 'versionType': 'git'}, {'status': 'affected', 'version': '1cd54e217c6e2cdb794a897b2f855e13ffcee586', 'lessThan': 'b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56', 'versionType': 'git'}, {'status': 'affected', 'version': '9690e8a342632344984af72bc56b7a1fba61e6cb', 'lessThan': '8cbad52ccfa6a7f089cfab34979bc6cc3bff25be', 'versionType': 'git'}, {'status': 'affected', 'version': 'b1b4efea05a56c0995e4702a86d6624b4fdff32f', 'lessThan': '7fb13fd7e9a59a37cd911efff83abe19e3ee029d', 'versionType': 'git'}, {'status': 'affected', 'version': '763d61ded752fbb3116efc951eff4363f237b7e0', 'versionType': 'git'}, {'status': 'affected', 'version': 'c7d190bb07bf4e3b217c69370e94d1b4c80a40ad', 'versionType': 'git'}, {'status': 'affected', 'version': '0b3ed3fa227ba778cabed96e7f8d84addb8bdf9c', 'versionType': 'git'}, {'status': 'affected', 'version': '6.6.145', 'lessThan': '6.6.148', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.96', 'lessThan': '6.12.101', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.18.39', 'lessThan': '6.18.42', 'versionType': 'semver'}, {'status': 'affected', 'version': '7.1.4', 'lessThan': '7.1.6', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.10.261', 'lessThan': '5.11', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.212', 'lessThan': '5.16', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.178', 'lessThan': '6.2', 'versionType': 'semver'}], 'programFiles': ['drivers/tty/serial/8250/8250_mid.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '7.2-rc3'}, {'status': 'unaffected', 'version': '0', 'lessThan': '7.2-rc3', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/tty/serial/8250/8250_mid.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10
    Added Reference https://git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e
    Added Reference https://git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d
    Added Reference https://git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be
    Added Reference https://git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.