CVE-2026-68434: Linux kernel · serial: 8250_mid: Fix NULL function pointer dereference on DNV/ICX-D/SNR platforms
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 7.0.0-1014.14~24.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 7.0.0-1014.14~24.04.1, 7.0.0-1017.17~24.04.1, 7.0.0-1016.16~24.04.1 +11
Exploitation evidence
Disclosed: evidence found.
CVE published 12 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available that adds the necessary NULL pointer checks to prevent kernel crashes. Users should apply the official Linux kernel updates that include this fix. The affected versions are explicitly listed and should be upgraded to patched versions.
Description
A NULL pointer dereference vulnerability was identified and fixed in the Linux kernel's 8250_mid serial driver affecting Denverton (DNV), Ice Lake Xeon D (ICX-D/CDF), and Snowridge (SNR) platforms. The issue arose because certain function pointers were set to NULL without corresponding NULL checks before dereferencing, leading to kernel crashes (kernel oops). This vulnerability affects specific Linux kernel versions listed and has been addressed by adding the necessary NULL checks.
References
- nvd.nist.gov/vuln/detail/CVE-2026-68434 (opens in a new tab)
- git.kernel.org/stable/c/1096397c31f6bffa95e77bdd18fbca085be83e10 (opens in a new tab)
- git.kernel.org/stable/c/600dcd548fb2b00a69f447684f52ba45d5a3540e (opens in a new tab)
- git.kernel.org/stable/c/7fb13fd7e9a59a37cd911efff83abe19e3ee029d (opens in a new tab)
- git.kernel.org/stable/c/8cbad52ccfa6a7f089cfab34979bc6cc3bff25be (opens in a new tab)
- git.kernel.org/stable/c/b2a3eeb57ba24f8a0e34a69d40adcc63e5b9ca56 (opens in a new tab)
- ubuntu.com/security/CVE-2026-68434 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-68434 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-3 (opens in a new tab)