Improper Initialization in Linux kernel - CVE-2026-46049
Published: May 28, 2026
Vulnerability identifier: #VU132440
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-2026-46049
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 spdif_passthru_playback_get_resources() when handling S/PDIF passthrough playback setup for 32000 Hz. A local user can trigger audio playback setup to cause a denial of service.
The issue can cause the calculation loop to spin indefinitely because the PLL rate remains 0 after card initialization.
How to mitigate CVE-2026-46049
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/09496158f6ebba8830593f8972035c02f97124c1
- https://git.kernel.org/stable/c/25ded535ee261161bcf19dafd525c542e606559d
- https://git.kernel.org/stable/c/30f9494c6f2b53a78822cfb653ffbb1d092d44c8
- https://git.kernel.org/stable/c/7d61662197ecdc458e33e475b6ada7f6da61d364
- https://git.kernel.org/stable/c/95b1ee8442cabbde83b2848e7c6100df90f3a00d