SB2026091993 - Use of Uninitialized Variable in Linux kernel clk visconti driver
Published: September 19, 2026
Security Bulletin ID
SB2026091993
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use of Uninitialized Variable (CVE-ID: CVE-2026-90122)
CWE-ID: CWE-457 - Use of Uninitialized Variable
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 use of an uninitialized variable in visconti_clk_register_gate() when registering a clock gate. A local user can trigger clock gate registration to cause a denial of service.
The issue is exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is enabled.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0e97c22b286e1918c6f48bad7e77fb8240a24b4a
- https://git.kernel.org/stable/c/1cc0539e5b0906bace15d3fc7347b344a017cc02
- https://git.kernel.org/stable/c/39c0e6c844a14945040cca4ccf6997792ab764c4
- https://git.kernel.org/stable/c/5ecfa72e74c6e2a765fa5bc1da574e5beae588f2
- https://git.kernel.org/stable/c/8f7980033e9f7ecaaecd873a0b5bf6b6c87d7e5a
- https://git.kernel.org/stable/c/9f756f1965bad65e6066608f33c36988cd10302a