Improper update of reference count in Linux kernel - CVE-2026-99089
Published: October 26, 2026
Vulnerability identifier: #VU157702
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99089
CWE-ID: CWE-911
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger kernel warnings and potentially disrupt audio device operation.
The vulnerability exists due to improper clock reference counting in the Samsung I2S driver when suspending a device whose operating clock was not enabled during probing. A local user can trigger runtime power-management suspension to cause an unmatched clock disable, producing a kernel warning and potentially disrupting audio device operation.
Affected software
Linux kernel
How to mitigate CVE-2026-99089
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/2c64c30d493d82d5edc95811cede0083e1195822
- https://git.kernel.org/stable/c/5dac6bf09b5a4fff2433629801309c3884c3e94a
- https://git.kernel.org/stable/c/64bb35079dcbc67901da1fe8c52c234cbcd17df3
- https://git.kernel.org/stable/c/7529254014764ae0b8c33d5c61a58f36c65b1a1c
- https://git.kernel.org/stable/c/a728c12f8bd89947894e227d0f4f83a895ac9ab7