SB20260812354 - Improper Initialization in Linux kernel comedi drivers driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Initialization (CVE-ID: CVE-2026-68182)

CWE-ID: CWE-665 - Improper Initialization

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper initialization in the comedi_parport interrupt handler and attach logic when handling interrupts during device attachment. A local user can supply a crafted I/O port base address or trigger a premature interrupt to cause a denial of service.

The issue can occur if the interrupt handler runs before the comedi device is fully attached, including when a user-supplied I/O port base address is not backed by real parallel port hardware.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/086a9ae3c5df63ec11033a8c0b3f6a1fd295ddd1
• https://git.kernel.org/stable/c/17221216ae8ce6a24e8a4e787382e3ebc81b88a8
• https://git.kernel.org/stable/c/5d059ce0e6a2f6f8b97273499d47b8f917097b48
• https://git.kernel.org/stable/c/b061bb4dca49fd93063359d3805387235818778c
• https://git.kernel.org/stable/c/cf26dd2d841583c54a87005c4934b92fddb930c3