Improper Initialization in Linux kernel - CVE-2026-46247
Published: June 4, 2026
Vulnerability identifier: #VU133343
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-46247
CWE-ID: CWE-665
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper initialization in clk_gfx3d_determine_rate in drivers/clk/qcom/clk-rcg2.c when determining the GFX3D clock rate. A local user can trigger clock rate determination to cause a denial of service.
The issue results in a kernel crash because the parent request map does not provide the expected best_parent_hw clock.
How to mitigate CVE-2026-46247
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2583cb925ca1ce450aa5d74a05a67448db970193
- https://git.kernel.org/stable/c/547ae2f17349c7586953af5ef50de43ef3f65e9e
- https://git.kernel.org/stable/c/56360aa4ddd736fc19e6d0b0206c5e437e0d6ff8
- https://git.kernel.org/stable/c/82cfe5292b11deb1dc33822f67f73cfbe8eafe25
- https://git.kernel.org/stable/c/8aa972eba1f29068d13bec716d33abca30fb3f2a
- https://git.kernel.org/stable/c/aed53da569fb96eec09b4817b1953bcc2e467eea