CVE-2026-63876: Linux kernel · serial: zs: Convert to use a platform device
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 15:35 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 Oct 2026.
What to do
AI-suggested
A fix is available that converts the zs serial driver to use a platform device, correcting the pointer dereference and resource handling issues. Users should update to the fixed Linux kernel version containing this patch. No additional mitigation actions are indicated or required.
Description
A vulnerability in the Linux kernel's zs serial driver was fixed by converting it to use a platform device. The issue caused a kernel crash during initialization of the first serial port due to dereferencing a null pointer derived from the port's parent device. The fix involves switching to platform device handling, updating resource management, and changing driver probe methods to prevent conflicts and crashes.
References
- git.kernel.org/stable/c/bb2040484f90f91b717060e1a66026cc4287bcf0 (opens in a new tab)
- git.kernel.org/stable/c/6a83d5e24a84e746425cd93539130e5f7381ef47 (opens in a new tab)
- git.kernel.org/stable/c/237dc8c08de3cb293b6607aaee8b13b3a671e267 (opens in a new tab)
- git.kernel.org/stable/c/4dc9f1517503c883d5ce25b7ab29d177d05edc6a (opens in a new tab)
- git.kernel.org/stable/c/7cac59d08a73cb866ec51a483a6f3fe0f531947c (opens in a new tab)