SB20260918250 - Use of Uninitialized Variable in Linux kernel arm arm-smmu-v3 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-90428)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

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

The vulnerability exists due to use of an uninitialized resource in the Tegra241 CMDQV error interrupt handler when handling a latched error interrupt after a kexec. A local privileged user can initiate a kexec while CMDQV is enabled with a latched error to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/2f627118b668659c6b195ac48beedb1bf8f53368
• https://git.kernel.org/stable/c/5acd67ceb38debe2fbf70ea35e2dec9f7ab01bbd
• https://git.kernel.org/stable/c/a168254ff8db08f2292be3d8fcbd37d2bb8c3d2d
• https://git.kernel.org/stable/c/b1605a56745f22670205f6561df5771bbbb62a99